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https://www.readbyqxmd.com/read/29334648/using-mass-struvite-precipitation-to-remove-recalcitrant-nutrients-and-micropollutants-from-anaerobic-digestion-dewatering-centrate
#1
M Abel-Denee, T Abbott, C Eskicioglu
The primary objective of this research was to remove recalcitrant nutrients from anaerobically digested sludge dewatering centrate. A struvite precipitation methodology is proposed where salt crystals are encouraged to ballast colloidal particles through heterogeneous nucleation and subsequent crystal growth. The secondary objective was to assess presence of micropollutants in precipitates. Four biologically unique dewatering centrates were used to test the precipitation methodology on the variety of anaerobic digester configurations that can be expected from municipal wastewater treatment plant...
January 5, 2018: Water Research
https://www.readbyqxmd.com/read/29334588/molecular-wire-effects-in-phenyleneethynylene-oligomers-surprising-insights
#2
Uwe Heiko Bunz, Marcel Hergert, Markus Bender, Kai Seehafer
We report the synthesis and quenching behavior of a series of water soluble, carboxylate-carrying phenyleneethynylene oligomers - monomer to tetramer - and their polymers and investigate their quenching behavior with different test analytes (paraquat, lead salts, mercury salts, picric acid, methylpyridinium iodide) in water and compare the results to that of the conjugated polymer. We find significant but analyte-dependent enhancement effects. For monovalent quenchers only the molecular wire effect applies but for divalent quenchers multivalency effects are also important...
January 15, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29334458/direct-electrochemical-vibrio-dna-sensing-adopting-highly-stable-graphene-flavin-mononucleotide-aqueous-dispersion-modified-interface
#3
Tao Yang, Huaiyin Chen, Zhiwei Qiu, Renzhong Yu, Shizhong Luo, Weihua Li, Kui Jiao
A bio-functionalized graphene nanohybrid was prepared by simultaneously sonicating graphene and riboflavin 5'-monophosphate sodium salt (FMNS). FMNS, as a bio-dispersant, shows an efficient stabilization for obtaining highly dispersed graphene nanosheets in an aqueous solution. Due to the superior dispersion of graphene and the excellent electrochemical redox activity of FMNS, a direct electrochemical DNA sensor was fabricated adopting the inherent electrochemical redox activity of Gr-FMNS. The comparison between using traditional electrochemical indicator ([Fe(CN)6]3-/4-) and using the self-signal of Gr-FMNS was fully conducted to study the DNA sensing performance...
January 15, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29334420/copper-catalyzed-regioselective-cleavage-of-c-x-bond-and-c-h-bond-a-strategy-for-sulfur-dioxide-fixation
#4
Daoshan Yang, Pengfei Sun, Wei Wei, Fengjuan Liu, Hui Zhang, Hua Wang
The first example of direct fixation of sulfur dioxide between heteroaryls and aryl halides has been developed via copper-catalyzed regioselective cleavage of C-X and C-H bonds under base-free and ligand-free conditions by using DABSO as a solid and bench-stable sulfur dioxide surrogate. This mild protocol results in double C-S bond-forming reactions from simple precursors in the absence of prefunctionalized organometallic reagents, arenediazonium salts, and iodonium salts which extends the still limited number of sulfur dioxide fixation strategies...
January 15, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29334386/organic-inorganic-hybrids-having-a-talc-like-structure-as-suitable-hosts-to-guest-a-wide-range-of-species
#5
J Brendlé
The sol-gel process involving hydrolysis and condensation reactions is an attractive way to form siloxane based hybrid materials since it is a one-step method performed under mild conditions. Organic-inorganic hybrids having a talc-like structure (TLH) can be obtained using this procedure starting from organotrialkoxysilanes having the formula R-Si(OR')3 (where R stands for an organic moiety and R' for a methyl or ethyl group) with different functionalities, an aqueous or ethanolic solution of a magnesium salt, and in some cases, an aqueous solution of sodium hydroxide...
January 15, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29334318/molecular-dynamics-perspective-on-the-thermal-stability-of-mandelate-racemase
#6
Jiali Gu, Hongfei Tong, Laiyu Sun, Zhijian Lin
Mandelate racemase from Pseudomonas putida is a promising candidate for the dynamic kinetic resolution of α-hydroxy carboxylic acids. In the present study, the thermal stability of mandelate racemase was investigated through molecular dynamics simulations in the temperature range of 303 K to 363 K, which can guide the design of mandelate racemase with higher stability. The basic features such as radius of gyration, surface accessibility, and secondary structure content suggested the instability of mandelate racemase at high temperatures...
January 15, 2018: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/29334279/uric-acid-and-the-vaccine-adjuvant-activity-of-aluminum-oxy-hydroxide-nanoparticles
#7
Sachin G Thakkar, Haiyue Xu, Xu Li, Zhengrong Cui
In an effort to improve the adjuvanticity of insoluble aluminum salts, we discovered that the adjuvant activity of aluminum salt nanoparticles is significantly stronger than aluminum salt microparticles, likely related to nanoparticle's stronger ability to directly activate NLRP3 inflammasome as the nanoparticles are more efficiently taken up by phagocytic cells. Endogenous signals such as uric acid from cell damage or death caused by the cytotoxicity of aluminum salts are thought to indirectly activate inflammasome, prompting us to hypothesize that the potent adjuvant activity of aluminum salt nanoparticles is also related to their ability to stimulate uric acid production...
January 15, 2018: Journal of Drug Targeting
https://www.readbyqxmd.com/read/29334190/the-effects-of-low-levels-of-trivalent-ions-on-a-standard-strain-of-escherichia-coli-atcc-11775-in-aqueous-solutions
#8
Can Deng, Xinpeng Li, Xinkai Xue, Richard M Pashley
Considering the ever-growing usage of trivalent salts in water treatment, for example, lanthanum salts in rare earth, AlCl3 and FeCl3 , the effects of different trivalent cations on the bacterium Escherichia coli (E. coli) ATCC 11775 strain have been studied in aqueous solutions. From colony incubation studies, the colony-forming unit (CFU) densities were found to decrease significantly in the presence of even low levels (10-5  mol/L) of lanthanum chloride. This level of reduction in CFU number is comparable to the results obtained using the known bacteriocidal cationic surfactant, C14 TAB...
January 15, 2018: MicrobiologyOpen
https://www.readbyqxmd.com/read/29334186/natural-humic-acid-based-phototheranostic-agent
#9
Zhao-Hua Miao, Kai Li, Pei-Ying Liu, Zhenglin Li, Huanjie Yang, Qingliang Zhao, Manli Chang, Qingzhu Yang, Liang Zhen, Cheng-Yan Xu
Humic acids, a major constituent of natural organic carbon resources, are naturally formed through the microbial biodegradation of animal and plant residues. Due to numerous physiologically active groups (phenol, carboxyl, and quinone), the biomedical applications of humic acid have been already investigated across different cultures for several centuries or even longer. In this work, sodium humate, the sodium salt of humic acid, is explored as phototheranostic agent for light-induced photoacoustic imaging and photothermal therapy based on intrinsic absorption in the near-infrared region...
January 15, 2018: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/29334076/pt-decorated-mos-sub-2-sub-nanoflakes-for-ultrasensitive-resistive-humidity-sensor
#10
Debasree Burman, Sumita Santra, Panchanan Pramanik, Prasanta Kumar Guha
In this work, we report the fabrication of a low power, humidity sensor where platinum nanoparticles (NPs) decorated few-layered Molybdenum disulphide (MoS<sub>2</sub>) nanoflakes have been used as the sensing layer. A mixed solvent was used to exfoliate the nanoflakes from the bulk powder. Then the Pt/MoS<sub>2</sub> composites were prepared by reducing Pt NPs from chloroplatinic acid hexahydrate using a novel reduction technique using sulfide salt. The successful reduction and composite preparation were confirmed using various material characterization tools like Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), Transmission Electron Microscopy (TEM), X-Ray Diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), Raman spectroscopy and UV-visible spectroscopy (UV-Vis)...
January 15, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29332829/synchronous-detection-of-ebolavirus-conserved-rna-sequences-and-ebolavirus-encoded-mirna-like-fragment-based-on-a-zwitterionic-copper-ii-metal-organic-framework
#11
Gui-Hua Qiu, Zi-Hua Weng, Pei-Pei Hu, Wen-Jun Duan, Bao-Ping Xie, Bin Sun, Xiao-Yan Tang, Jin-Xiang Chen
From a three-dimensional (3D) metal-organic framework (MOF) of {[Cu(Cmdcp)(phen)(H2O)]2·9H2O}n (1, H3CmdcpBr = N-carboxymethyl-(3,5-dicarboxyl)pyridinium bromide, phen = phenanthroline), a sensitive and selective fluorescence sensor has been developed for the simultaneous detection of ebolavirus conserved RNA sequences and ebolavirus-encoded microRNA-like (miRNA-like) fragment. The results from molecular dynamics simulation confirmed that MOF 1 absorbs carboxyfluorescein (FAM)-tagged and 5(6)-carboxyrhodamine, triethylammonium salt (ROX)-tagged probe ss-DNA (probe DNA, P-DNA) by π…π stacking and hydrogen bonding, as well as additional electrostatic interactions to form a sensing platform of P-DNAs@1 with quenched FAM and ROX fluorescence...
April 1, 2018: Talanta
https://www.readbyqxmd.com/read/29332828/uplc-ms-ms-analysis-for-antioxidant-components-of-lycii-fructus-based-on-spectrum-effect-relationship
#12
Xian-Fei Zhang, Juan Chen, Jun-Li Yang, Yan-Ping Shi
Lycii Fructus is widely cultivated in the Northwest China. It is well-known for its antiaging effect in traditional Chinese medicines (TCMs), but the effective components are not clear. In this work, the ultra-performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS) was used to study the antioxidant components of Lycii Fructus through analyzing the spectrum-effect relationship, and the positive correlation components with antioxidant activity were partially identified. The extractums of Lycii Fructus were adsorbed with macroporous resin, and then eluted with water and 30%, 60%, 90% ethanol in turn...
April 1, 2018: Talanta
https://www.readbyqxmd.com/read/29332388/immersion-and-contact-efflorescence-induced-by-mineral-dust-particles
#13
Shuichi B Ushijima, Ryan D Davis, Margaret A Tolbert
The phase state of inorganic salt aerosols impacts their properties including the ability to undergo hygroscopic growth, catalyze heterogeneous reactions, and act as cloud condensation nuclei. Here, we report the first observation of contact efflorescence by mineral dust aerosol. The efflorescence of aqueous ammonium sulfate ((NH4)2SO4) and sodium chloride (NaCl) droplets by contact with three types of mineral dust particles (illite, montmorillonite, and NX Illite), were examined using an optical levitation chamber...
January 13, 2018: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29332385/a-highly-sensitive-ratiometric-self-assembled-micellar-nanoprobe-for-nitroxyl-and-its-application-in-vivo
#14
Feiyi Wang, Shaohua Yuan, Guichun Yang, CuiFen Lu, Junqi Nie, Zuxing Chen, Jun Ren, Yuan Qiu, Qi Sun, Chunchang Zhao, Wei-Hong Zhu
Nitroxyl (HNO) is a derivative of nitric oxide (NO) which plays an essential role in various biological and pharmacological events. Until now, the in situ trapping and specific detection of HNO in living samples is still challenging. In this project, we fabricated a novel BODIPY-based micellar nanoprobe for monitoring nitroxyl in vitro and in vivo in ratiometric mode in aqueous solution. The probe (P-BODIPY-N) contains an asymmetrical BODIPY dye for fluorescent signaling, and a diphenylphosphinobenzoyl as the trigger moiety, then we encapsulated P-BODIPY-N into the hydrophobic interior of an amphiphilic copolymer (mPEG-DSPE) and prepared a novel BODIPY-based micellar nanoprobe: NP-BODIPY-N...
January 15, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29332280/hydrogeochemical-processes-and-influence-of-seawater-intrusion-in-coastal-aquifers-south-of-chennai-tamil-nadu-india
#15
G Kanagaraj, L Elango, S G D Sridhar, G Gowrisankar
Seawater intrusion promotes the salinity of groundwater, and it poses a great environmental impact on a global scale. The present study was carried out to determine the hydrogeochemical processes and influence of seawater intrusion in the coastal aquifers using geophysical, geochemical, and stable isotope techniques. The true resistivity value ranges from 0.5 to 8008.5 Ω-m which has been measured using vertical electrical sounding (VES) based on the Schlumberger method. About 33 groundwater samples were collected during post-monsoon (POM) (January 2012) and pre-monsoon (PRM) (June 2012) seasons from open and bore wells and were analyzed for major ions and stable isotopes...
January 14, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29332274/callitriche-cophocarpa-water-starwort-proteome-under-chromate-stress-evidence-for-induction-of-a-quinone-reductase
#16
Paweł Kaszycki, Aleksandra Dubicka-Lisowska, Joanna Augustynowicz, Barbara Piwowarczyk, Wojciech Wesołowski
Chromate-induced physiological stress in a water-submerged macrophyte Callitriche cophocarpa Sendtn. (water starwort) was tested at the proteomic level. The oxidative stress status of the plant treated with 1 mM Cr(VI) for 3 days revealed stimulation of peroxidases whereas catalase and superoxide dismutase activities were similar to the control levels. Employing two-dimensional electrophoresis, comparative proteomics enabled to detect five differentiating proteins subjected to identification with mass spectrometry followed by an NCBI database search...
January 13, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29332209/the-rapid-diagnosis-of-viral-respiratory-tract-infections-and-its-impact-on-antimicrobial-stewardship-programs
#17
Şiran Keske, Önder Ergönül, Faik Tutucu, Doruk Karaaslan, Erhan Palaoğlu, Füsun Can
We aimed to describe the potential benefit of new rapid molecular respiratory tests (MRT) in decreasing inappropriate antibiotic use among the inpatients presenting with influenza-like illness (ILI). We included patients from inpatient and outpatient departments who had ILI and performed MRT between 1 January 2015 and 31 December 2016 in a 265-bed private hospital in Istanbul. At the end of 2015, we implemented antimicrobial stewardship including systematic use of MRT. Then, we compared our observations between the year 2015 and the year 2016...
January 13, 2018: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/29331925/overexpression-of-chrysanthemum-lavandulifolium-clcbf1-in-chrysanthemum-morifolium-white-snow-improves-the-level-of-salinity-and-drought-tolerance
#18
Wenjie Gao, Miao He, Jie Liu, Xin Ma, Yu Zhang, Silan Dai, Yunwei Zhou
This paper reports the first study on plant CBF transcription factors (TF) in salt and drought stress responses in Chrysanthemum lavandulifolium. A CBF homolog gene, named as ClCBF1, from C. lavandulifolium was isolated using rapid amplification of cDNA ends (RACE). The deduced peptide is comprised of 210 amino acids (AA) containing an AP2 structural domain characteristic of the AP2 gene family. Quantitative real-time PCR revealed that ClCBF1 gene exhibit differential expression patterns across root, leaf and stem tissues, and it was strongly induced under salt and drought treatments of C...
January 8, 2018: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29331915/theory-of-water-treatment-by-capacitive-deionization-with-redox-active-porous-electrodes
#19
Fan He, P M Biesheuvel, Martin Z Bazant, T Alan Hatton
Capacitive deionization (CDI) for water treatment, which relies on the capture of charged species to sustain the electrical double layers (EDLs) established within porous electrodes under an applied electrical potential, can be enhanced by the chemical attachment of fixed charged groups to the porous electrode electrodes (ECDI). It has recently been demonstrated that further improvements in capacity and energy storage can be gained by functionalization of the electrode surfaces with redox polymers in which the charge on the electrodes can be modulated through Faradaic reactions under different cell voltages in a capacitive process that can be called "Faradaic CDI" (FaCDI)...
January 3, 2018: Water Research
https://www.readbyqxmd.com/read/29331859/development-of-a-method-to-determine-axitinib-lapatinib-and-afatinib-in-plasma-by-micellar-liquid-chromatography-and-validation-by-the-european-medicines-agency-guidelines
#20
Jaume Albiol-Chiva, Josep Esteve-Romero, Juan Peris-Vicente
A method based on micellar liquid chromatography to quantify the tyrosine kinase inhibitors axitinib, lapatinib and afatinib in plasma is reported. The sample pretreatment was a simple 1/5-dilution in a pure micellar solution, filtration and direct injection, without requiring extraction or purification steps. The three drugs were resolved from the matrix in 17min, using an aqueous solution of 0.07M sodium dodecyl sulfate - 6.0% 1-pentanol, buffered at pH7 with 0.01M phosphate salt as mobile phase, running under isocratic mode at 1mL/min through a C18 column...
January 2, 2018: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
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