Search results for: nitrate
#33098495 2020/10/24 To Up
Evaluation of copper tailing amendments through poultry waste and ammonium nitrate.In this study, two amendments, poultry waste and ammonium nitrate, were evaluated to condition and stabilize a mine tailing and thus help the vegetation cover settle. Individually, ammonium nitrate was tested as a nitrogen source and chicken bone ash as a phosphate source. For this, laboratory tests were made on soil columns from the area to be remediated. The mobility and availability of metals and nutrients were determined by analyzing their leachates chemically. The results showed that the use of chicken bone ash decreases soluble metal concentrations, particularly in Fe and soluble Mn. On the other hand, experimental conditions proved that the acidification produced by ammonium nitrate nitrification does not significantly increase the lechate metal content. Therefore, its use for fertilization does not involve phytotoxicity risks. Regarding the availability of macronutrients as well as trace elements, the results showed that the concentrations lie within the ranges suitable for plant nutrition. So, the treatments are effective both for fertilization and phytoremediation.
Ítalo L Montofré, Elizabeth J Lam, Yendery Ramírez, María E Gálvez
1905 related Products with: Evaluation of copper tailing amendments through poultry waste and ammonium nitrate.500 G 1KG 25 MG100ul 1 kit(s) 25 mg 5 G1100 mg 1KG1 ml
#33098106 2020/10/23 To Up
Plasma membrane CBL Ca sensor proteins function in regulating primary root growth and nitrate uptake by affecting global phosphorylation patterns and microdomain protein distribution.The collective function of Calcineurin B-like (CBL) Ca sensors and CBL interacting protein kinases (CIPKs) in decoding plasma membrane initiated Ca signals to convey developmental and adaptive responses to fluctuating nitrate availability remained to be determined. Here, we generated a cbl-quintuple mutant in Arabidopsis thaliana devoid of these Ca sensors at the plasma membrane and performed comparative phenotyping, nitrate flux determination, phosphoproteome analyses and studies of membrane domain protein distribution in response to low and high nitrate availability. We observed that CBL proteins exert multifaceted regulation of primary and lateral root growth and nitrate fluxes. Accordingly, we found that loss of plasma membrane Ca sensor function simultaneously affected protein phosphorylation of numerous membrane proteins including several nitrate transporters, proton pumps and aquaporins as well as their distribution within plasma membrane microdomains and identified specific phosphorylation and domain distribution pattern during distinct phases of low and high of nitrate responses. Collectively, these analyses reveal a central and coordinative function of CBL-CIPK mediated signalling in conveying plant adaptation to fluctuating nitrate availability and identify a crucial role of Ca signalling in regulating the composition and dynamics of plasma membrane microdomains.
Liang-Cui Chu, Jan Niklas Offenborn, Leonie Steinhorst, Xu Na Wu, Lin Xi, Zhi Li, Aurore Jacquot, Laurence Lejay, Jörg Kudla, Waltraud X Schulze
2152 related Products with: Plasma membrane CBL Ca sensor proteins function in regulating primary root growth and nitrate uptake by affecting global phosphorylation patterns and microdomain protein distribution.2 Pieces/Box1mg501002 Pieces/Box10101002101mg
#33097251 2020/10/08 To Up
Enhancing bio-cathodic nitrate removal through anode-cathode polarity inversion together with regulating the anode electroactivity.Bio-cathodic nitrate removal uses autotrophic nitrate-reducing bacteria as catalysts to realize the nitrate removal process and has been considered as a cost-effective way to remove nitrate contamination. However, the present bio-cathodic nitrate removal process has problems with long start-up time and low performance, which are urgently required to improve for its application. In this study, we investigated an anode-cathode polarity inversion method for rapidly cultivating high-performance nitrate-reducing bio-cathode by regulating bio-anodic bio-oxidation electroactivities under different external resistances and explored at the first time the correlation between the oxidation performance and the reduction performance of one mixed-bacteria bioelectrode. A high bio-electrochemical nitrate removal rate of 2.74 ± 0.03 gNO-N m d was obtained at the bioelectrode with high bio-anodic bio-oxidation electroactivity, which was 4.0 times that of 0.69 ± 0.03 gNO-N m d at the bioelectrode with low bio-oxidation electroactivity, and which was 1.3-7.9 times that of reported (0.35-2.04 gNO-N m d). 16S rRNA gene sequences and bacterial biomass analysis showed higher bio-cathodic nitrate removal came from higher bacterial biomass of electrogenic bacteria and nitrate-reducing bacteria. A good linear correlation between the bio-cathodic nitrate removal performance and the reversed bio-anodic bio-oxidation electroactivity was presented and likely implied that electrogenic biofilm had either action as autotrophic nitrate reduction or promotion to the development of autotrophic nitrate removal system. This study provided a novel strategy not only to rapidly cultivate high-performance bio-cathode but also to possibly develop the bio-cathode with specific functions for substance synthesis and pollutant detection.
Zhufan Lin, Shaoan Cheng, Zhen Yu, Jiawei Yang, Haobin Huang, Yi Sun
2610 related Products with: Enhancing bio-cathodic nitrate removal through anode-cathode polarity inversion together with regulating the anode electroactivity.500 Units100 mg 500 ml 10 Plates10x96, 2.0ml cultures100ug Lyophilized100ug Lyophilized1mg100 mg 500 ml
#33097163 2020/06/14 To Up
Adsorption mechanisms of PFOA onto activated carbon anchored with quaternary ammonium/epoxide-forming compounds: A combination of experiment and model studies.When wood-based activated carbon was tailored with quaternary ammonium/epoxide (QAE) forming compounds (QAE-AC), this tailoring dramatically improved the carbon's effectiveness for removing perfluorooctanoic acid (PFOA) from groundwater. With favorable tailoring, QAE-AC removed PFOA from groundwater for 118,000 bed volumes before half-breakthrough in rapid small scale column tests, while the influent PFOA concentration was 200 ng/L. The tailoring involved pre-dosing QAE at an array of proportions onto this carbon, and then monitoring bed life for PFOA removal. When pre-dosing with 1 mL QAE, this PFOA bed life reached an interim peak, whereas bed life was less following 3 mL QAE pre-dosing, then PFOA bed life exhibited a steady rise for yet subsequently higher QAE pre-dosing levels. Large-scale atomistic modelling was used herein to provide new insight into the mechanism of PFOA removal by QAE-AC. Based on experimental results and modelling, the authors perceived that the QAE's epoxide functionalities cross-linked with phenolics that were present along the activated carbon's graphene edge sites, in a manner that created mesopores within macroporous regions or created micropores within mesopores regions. Also, the QAE could react with hydroxyls outside of these pore, including the hydroxyls of both graphene edge sites and other QAE molecules. This latter reaction formed new pore-like structures that were external to the activated carbon grains. Adsorption of PFOA could occur via either charge balance between negatively charged PFOA with positively charged QAE, or by van der Waals forces between PFOA's fluoro-carbon tail and the graphene or QAE carbon surfaces.
Chen Yuan, Yang Huang, Fred S Cannon, Zhiwei Zhao
1114 related Products with: Adsorption mechanisms of PFOA onto activated carbon anchored with quaternary ammonium/epoxide-forming compounds: A combination of experiment and model studies.5mg0.1ml (1mg/ml)5 mg100ug 1KG200ul100 mg25 mgOne 96-Well Microplate Ki 100ul
#33097152 2020/06/21 To Up
Catalytic activity of porous manganese oxides for benzene oxidation improved via citric acid solution combustion synthesis.Various manganese oxides (MnO) prepared via citric acid solution combustion synthesis were applied for catalytic oxidation of benzene. The results showed the ratios of citric acid/manganese nitrate in synthesizing process positively affected the physicochemical properties of MnO, e.g., BET (Brunauer-Emmett-Teller) surface area, porous structure, reducibility and so on, which were in close relationship with their catalytic performance. Of all the catalysts, the sample prepared at a citric acid/manganese nitrate ratio of 2:1 (C2M1) displayed the best catalytic activity with T (the temperature when 90% of benzene was catalytically oxidized) of 212℃. Further investigation showed that C2M1 was MnO with abundant nano-pores, the largest surface area and the proper ratio of surface Mn/Mn, resulting in preferable low-temperature reducibility and abundant surface active adsorbed oxygen species. The analysis results of the in-situ Fourier transform infrared spectroscopy (in-situ FTIR) revealed that the benzene was successively oxidized to phenolate, o-benzoquinone, small molecules (such as maleates, acetates, and vinyl), and finally transformed to CO and HO.
Hao Guo, Zhixiang Zhang, Zhi Jiang, Mingxia Chen, Hisahiro Einaga, Wenfeng Shangguan
2285 related Products with: Catalytic activity of porous manganese oxides for benzene oxidation improved via citric acid solution combustion synthesis.10 UG 500 ml 1000 ml 5KG 250 ml 5 mg 1000 ml 30 ml 1000 ml 5 G 500 ml 125 ml
#33097150 2020/06/21 To Up
Bioaugmentation and quorum sensing disruption as solutions to increase nitrate removal in sequencing batch reactors treating nitrate-rich wastewater.Bioaugmentation of denitrifying bacteria can serve as a promising technique to improve nutrient removal during wastewater treatment. While denitrification inhibition by bacterial quorum sensing (QS) in Pseudomonas aeruginosa has been indicated, the application of bacterial QS disruption to improve nitrate removal from wastewater has not been investigated. In this study, the effect of bioaugmentation of P. aeruginosa SD-1 on nitrate removal in sequencing batch reactors that treat nitrate rich wastewater was assessed. Additionally, the potential of a quorum sensing inhibitor (QSI) to improve denitrification following bacterial bioaugmentation was evaluated. Curcumin, a natural plant extract, was used as a QSI. The chemical oxygen demand (COD) and initial nitrate concentration of the influent were 700±20 mg/L and 200±10 mg/L respectively, and their respective concentrations in the effluent were 56.9±3.2 mg/L and 9.0±3.2 mg/L. Thus, the results revealed that bioaugmentation of P. aeruginosa SD-1 resulted in an increased nitrate removal to 82%±1%. Further, nitrate was almost completely removed following the addition of the QSI, and activities of nitrate reductase and nitrite reductase increased by 88%±2% and 74%±2% respectively. The nitrogen mass balance indicated that aerobic denitrification was employed as the main pathway for nitrogen removal in the reactors. The results imply that bioaugmentation and modulation of QS in denitrifying bacteria, through the use of a QSI, can enhance nitrate removal during wastewater treatment.
Xinyi Ruan, Jun Yin, Xueyan Cui, Na Li, Dongsheng Shen
2342 related Products with: Bioaugmentation and quorum sensing disruption as solutions to increase nitrate removal in sequencing batch reactors treating nitrate-rich wastewater.96 assays1 kit1 kit100 assays 30 ml 1 kit(96 Wells)48 assays 100 assays100 mg1 kit(96 Wells)
#33096781 2020/10/21 To Up
Metal Nanoparticles Formation from Nickel Hydroxide.In this study, the mechanism of nickel nanoparticle formation from its hydroxide was analyzed. Metallic nickel nanoparticles were obtained through the hydroxide's reduction under hydrogen. Nickel hydroxides were produced from nickel (II) nitrate hexahydrate and NaOH by deposition under various initial conditions. The influence of washing treatment on the dispersion of obtained nickel powders was studied. The washing procedure of precipitates was carried out by centrifugation, ultrasonic treatment, and decantation. X-ray diffractometry, transmission electron microscopy, low-temperature nitrogen adsorption, infrared spectroscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy methods were used for nanoparticle characterization. Based on the resulting data, a model of the Ni(OH) aggregate structure after deposition was proposed. The number of nickel hydroxide particles required to form one nickel nanoparticle was estimated, and a model of its formation was proposed.
Elena N Sidorova, Ella L Dzidziguri, Yulia P Vinichenko, Dmitriy Yu Ozherelkov, Alexander S Shinkaryov, Alexander A Gromov, Anton Yu Nalivaiko100μg 1KG 500 ml 100μg100μg100ug100μg25 ml200 ug100μg100ML100 ml
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#33096218 2020/10/20 To Up
Topical Management of Bleeding from Malignant Wounds caused by Breast Cancer: A Systematic Review.Topical management is the main form of control of signs and symptoms regarding malignant wounds (MWs) arising from tumor progression on the skin. Nevertheless, few studies have explored this theme and evidence on the effectiveness of the methods used to control bleeding is unknown, leading to a lack of consensus to support clinical practice.
Flavia Firmino, Diana Lima Villela-Castro, Juliano Dos Santos, Vera Lúcia Conceição de Gouveia Santos
1782 related Products with: Topical Management of Bleeding from Malignant Wounds caused by Breast Cancer: A Systematic Review.
#33096198 2020/10/20 To Up
Anti-hypernociceptive and anti-inflammatory effects of JM-20: A novel hybrid neuroprotective compound.The present study examines the possible effect of the novel hybrid molecule JM-20 (3-ethoxycarbonyl-2-methyl-4-(2-nitrophenyl)-411-dihydro-1H-pyrido[2,3-b] [1,5] benzodiazepine) on pain-related behaviours in a persistent pain model (5% formalin test) and in the neutrophil migration events during the inflammatory process. It further introduces JM-20 in a chronic constriction injury (CCI) model to clarify the possible subjacent mechanisms with its consequent clinical relevance. A single administration of JM-20 (20 or 40 mg/kg, per os [p.o.]) decreased licking/biting exclusively in the tonic phase of the formalin test in a GABA/benzodiazepine (BZD) receptor antagonist flumazenil-sensitive manner. JM-20 reduced in vivo neutrophil migration, rolling and adhesion to the endothelium induced by intraperitoneal administration of carrageenan in mice. In addition, plasma extravasation and tumour necrosis factor alpha production in the peritoneal fluid were decreased. Treatment with JM-20 (20 mg/kg, p.o.) for 7 days after CCI reduced mechanical hypersensitivity in a NG-monomethyl-l-arginine (L-NMMA)/methylene blue/glibenclamide-sensitive manner. Histopathological signs of Wallerian degeneration (WD) of the sciatic nerve were also attenuated, as well as interleukin-1 beta release in the spinal cord. The nitrate/nitrite concentration was increased centrally and did not show differences at the peripheral nerve level. The findings of this study suggest JM-20 can decrease persistent pain. A transient activity of its BDZ portion on nociceptive pathways mediated by GABA/BZD receptors in association with its anti-inflammatory properties could be at least partially involved in this effect. JM-20 decreased CCI-induced mechanical hypersensitivity via the l-arginine/nitric oxide (NO)/cyclic GMP-sensitive ATP-sensitive potassium channel pathway. Its neuroprotective ability by preventing WD could be implicated in its anti-neuropathic mechanisms.
Bárbara B Garrido-Suárez, Gabino Garrido, Marian Castro-Labrada, Nelson Merino, Odalys Valdés, Zenia Pardo, Estael Ochoa-Rodríguez, Yamila Verdecia-Reyes, René Delgado-Hernández, Jozi Godoy-Figuereido, Sergio H Ferreira
2241 related Products with: Anti-hypernociceptive and anti-inflammatory effects of JM-20: A novel hybrid neuroprotective compound.1000 TESTS/0.65ml1mg100ul0.1 mg100ul200 1 ml100.00 ul1000 100ug Lyophilized100ug Lyophilized383 μg
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