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https://www.readbyqxmd.com/read/28437744/fe-%C3%A2-ions-enhanced-catalytic-properties-of-bio-2co3-nanowires-and-mechanism-study-for-complete-degradation-of-xanthate
#1
Yujiao Guo, Kuixin Cui, Mingyi Hu, Shengming Jin
The wire-like Fe(3+)-doped (BiO)2CO3 photocatalyst was synthesized by a hydrothermal method. The photocatalytic property of Fe(3+)-doped (BiO)2CO3 nanowires was evaluated through degradation of sodium isopropyl xanthate under UV-visible light irradiation. The as-prepared Fe(3+)-doped (BiO)2CO3 nanowires were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), UV-visible diffuse reflectance spectroscopy (UV-vis DRS), X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR) in detail...
April 17, 2017: Chemosphere
https://www.readbyqxmd.com/read/28437724/synthesis-of-zno-nanorod-based-materials-for-antibacterial-antifungal-activities-dna-cleavage-and-efficient-ultrasound-assisted-dyes-adsorption
#2
Ali Akbar Bazrafshan, Mehrorang Ghaedi, Shaaker Hajati, Reza Naghiha, Arash Asfaram
Undoped and Au-doped ZnO-nanorods were synthesized in the presence of ultrasound and loaded on activated carbon following characterization by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmittance electron microscopy (TEM), UV-vis spectrophotometry and Fourier transform infrared spectroscopy (FTIR). The Au-doped ZnO-nanorod-loaded activated carbon (Au-ZnO-NRs-AC) was used for the simultaneous removal of methylene blue (MB) and auramine O (AO) from aqueous solutions. Central composite design (CCD) under response surface methodology (RSM) was applied to model and optimize the dyes removal versus adsorbent mass, pH, and initial dyes concentration and sonication time as well as to investigate the possible interaction between these variables...
April 21, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28437697/catalytic-polymer-clay-composite-for-enhanced-removal-and-degradation-of-diazinon
#3
Itamar A Shabtai, Yael G Mishael
It is well established that organophosphate pesticides, such as diazinon, pose environmental and health risks. Diazinon is prone to rapid acidic hydrolysis, forming the less toxic compound 2-isopropyl-6-methyl-4-pyrimidinol (IMP). In this study, diazinon surface catalyzed hydrolysis was achieved by its adsorption to a composite, based on protonated poly (4-vinyl-pyridine-co-styrene) (HPVPcoS) and montmorillonite (MMT) clay. The adsorption affinity and kinetics of diazinon to HPVPcoS-MMT were significantly higher than those obtained to the deprotonated PVPcoS-MMT, emphasizing the importance of hydrogen bonding...
April 6, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28437676/superior-inferior-position-of-patellar-component-affects-patellofemoral-kinematics-and-contact-forces-in-computer-simulation
#4
Shinichiro Nakamura, Yoshihisa Tanaka, Shinichi Kuriyama, Kohei Nishitani, Hiromu Ito, Moritoshi Furu, Shuichi Matsuda
BACKGROUND: Anterior knee pain has been reported as a major postoperative complication after total knee arthroplasty, which may lead to patient dissatisfaction. Rotational alignment and the medial-lateral position correlate with patellar maltracking, which can cause knee pain postoperatively. However, the superior-inferior position of the patellar component has not been investigated. The purpose of the current study was to investigate the effects of the patellar superior-inferior position on patellofemoral kinematics and kinetics...
April 18, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28437642/pentoses-and-light-intensity-increase-the-growth-and-carbohydrate-production-and-alter-the-protein-profile-of-chlorella-minutissima
#5
B C B Freitas, A P A Cassuriaga, M G Morais, J A V Costa
High concentrations of carbon, which is considered a necessary element, are required for microalgal growth. Therefore, the identification of alternative carbon sources available in large quantities is increasingly important. This study evaluated the effects of light variation and pentose addition on the carbohydrate content and protein profile of Chlorella minutissima grown in a raceway photobioreactor. The kinetic parameters, carbohydrate content, and protein profile of Chlorella minutissima and its theoretical potential for ethanol production were estimated...
April 9, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28437592/cover-image-volume-232-number-8-august-2017
#6
Anjali Somal, Irfan A Bhat, Indu B, Anuj P Singh, Bibhudatta S K Panda, Perumal A Desingu, Sriti Pandey, Mukesh K Bharti, Amar Pal, Guttula Saikumar, Vikash Chandra, Guttula Taru Sharma
Cover: The cover image, by Guttula Taru Sharma et al., is based on the Original Research Article Impact of Cryopreservation on Caprine Fetal Adnexa Derived Stem Cells and Its Evaluation for Growth Kinetics, Phenotypic Characterization, and Wound Healing Potential in Xenogenic Rat Model, DOI: 10.1002/jcp.25731.
August 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28437571/label-free-high-temporal-resolution-assessment-of-cell-proliferation-using-digital-holographic-microscopy
#7
Birgit Janicke, Andreas Kårsnäs, Peter Egelberg, Kersti Alm
Cell proliferation assays are widely applied in biological sciences to understand the effect of drugs over time. However, current methods often assess cell population growth indirectly, that is, the cells are not actually counted. Instead other parameters, for example, the amount of protein, are determined. These methods often also demand phototoxic labels, have low temporal resolution, or employ end-point assays, and frequently are labor intensive. We have developed a robust and label-free kinetic cell proliferation assay with high temporal resolution for adherent cells using digital holographic microscopy (DHM), one of many quantitative phase microscopy techniques...
April 24, 2017: Cytometry. Part A: the Journal of the International Society for Analytical Cytology
https://www.readbyqxmd.com/read/28437473/molecular-simulations-and-markov-state-modeling-reveal-the-structural-diversity-and-dynamics-of-a-theophylline-binding-rna-aptamer-in-its-unbound-state
#8
Becka M Warfield, Peter C Anderson
RNA aptamers are oligonucleotides that bind with high specificity and affinity to target ligands. In the absence of bound ligand, secondary structures of RNA aptamers are generally stable, but single-stranded and loop regions, including ligand binding sites, lack defined structures and exist as ensembles of conformations. For example, the well-characterized theophylline-binding aptamer forms a highly stable binding site when bound to theophylline, but the binding site is unstable and disordered when theophylline is absent...
2017: PloS One
https://www.readbyqxmd.com/read/28437278/pharmacodynamic-and-kinetic-behavior-of-low-intermediate-and-high-dose-landiolol-during-long-term-infusion-in-caucasians
#9
Günther Krumpl, Ivan Ulč, Michaela Trebs, Pavla Kadlecová, Juri Hodisch, Gabriele Maurer, Bernhard Husch
PK, PD, safety, and tolerability of long-term administration of landiolol, a fast-acting cardioselective β-blocker, were investigated for the first time in Caucasian subjects in a prospective clinical trial.Blood concentrations of landiolol and its metabolites, HR, BP and ECG parameters were studied in twelve healthy volunteers receiving continuous infusions of a new 12 mg/mL formulation of landiolol using a dose-escalation regimen (10 µg/kg BW/min for 2 hr, 20 µg/kg BW/min for 2 hr, 40 µg/kg BW/min for 20 hr, 6 hr follow-up)...
April 18, 2017: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/28437081/silicon-induced-uv-transparency-in-phosphate-glasses-and-its-application-to-the-enhancement-of-the-uv-type-b-emission-of-gd-3
#10
José A Jiménez
The silicon route to improve the ultraviolet (UV) transparency in phosphate glasses is investigated, and further exploited to enhance the UV type B (280-320 nm) emission of gadolinium(III) relevant for biomedical applications. The glasses were synthesized with a barium-phosphate composition by melt-quenching in ambient atmosphere, and the optical properties investigated by optical absorption and photoluminescence (PL) spectroscopy including emission decay kinetics. An improvement in the UV transparency was gradually developed for the glasses melted merely with increasing amounts of Si powder...
April 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28437080/comparison-of-tumor-penetration-of-podophyllotoxin-carboxymethylcellulose-conjugates-with-various-chemical-compositions-in-tumor-spheroid-culture-and-in-vivo-solid-tumor
#11
Yang Yang, Aniruddha Roy, Yucheng Zhao, Elijus Undzys, Shyh-Dar Li
Polymer conjugation is an attractive approach for delivering insoluble and highly toxic drugs to tumors. However, most reports in the literature only disclose the optimal composition without emphasizing rational design or composition optimization to achieve maximized biological effects. In this study, we aimed to demonstrate that composition of a polymer conjugate would determine its physiochemical characteristics, tumor penetration and, ultimately, the in vivo efficacy. We also aimed to examine whether the tumor spheroid model could generate comparable results with the in vivo tumor model in terms of tumor penetration and efficacy of the various polymer conjugates...
April 24, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/28437071/revealing-the-initial-reaction-behavior-in-the-continuous-synthesis-of-metal-organic-frameworks-using-real-time-synchrotron-x-ray-analysis
#12
Angelos Polyzoidis, Martin Etter, Michael Herrmann, Stefan Loebbecke, Robert E Dinnebier
In recent years, continuous process technologies have attracted increasing attention, as a means of overcoming limitations in the repeatability and reproducibility of metal-organic framework (MOF) synthesis. Research in this area, however, has neglected to provide insight into the phenomenon leading to the formation of MOFs. In this work, we report the adaption of high-energy synchrotron powder X-ray diffraction analysis to a continuous ZIF-8 production process for online monitoring of the reaction behavior and crystallite formation during the first seconds of the MOF synthesis...
April 24, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28437030/selective-nucleation-of-gaas-on-si-nanofacets
#13
Ivan Prieto, Roksolana Kozak, Oliver Skibitzki, Marta D Rossell, Thomas Schroeder, Rolf Erni, Hans von Känel
The early growth stage of GaAs by metal organic vapor phase epitaxy on a novel kind of Si substrate is investigated. The substrate consists of nanotips (NTs) fabricated on a Si(001) wafer by means of lithography and reactive ion etching. 3D GaAs nanocrystals are found to nucleate with a probability of 90% on the (n0m), (-n0m), (0nm), and (0-nm) facets (n, m integers) of these NTs. Additionally, in terms of nucleation yield, an average of 2 GaAs nanocrystals in each of those facets is observed. By contrast, facets of type {±nnm} remain virtually free of any 3D nuclei...
April 24, 2017: Small
https://www.readbyqxmd.com/read/28436946/essential-role-for-bim-in-mediating-the-apoptotic-and-antitumor-activities-of-immunotoxins
#14
A Antignani, D Segal, N Simon, R J Kreitman, D Huang, D J FitzGerald
Protein synthesis is crucial for regulating cell homeostasis and, when unrestricted, it can lead to tumorigenesis. Immunotoxins derived from Pseudomonas exotoxin are antibody-toxin fusion proteins that inhibit protein synthesis of mammalian cells via ADP-ribosylation of the eukaryotic elongation factor-2. Here we investigate the role of the Bcl-2 family proteins in the response of cancer cells to immunotoxin challenge. Besides the well-known reduction of the prosurvival Bcl-2 family member, Mcl-1, following inhibition of protein synthesis, we show for the first time that immunotoxins also reduce the levels of selected proapoptotic BH-3-only proteins...
April 24, 2017: Oncogene
https://www.readbyqxmd.com/read/28436826/degradation-of-nitro-based-pharmaceuticals-by-uv-photolysis-kinetics-and-simultaneous-reduction-on-halonitromethanes-formation-potential
#15
Huiyu Dong, Zhimin Qiang, Junfeng Lian, Jiuhui Qu
This study investigated the degradation kinetics and halonitromethanes formation potential (HNMsFP) of two nitro-based pharmaceuticals (i.e., ranitidine (RNTD) and nizatidine (NZTD)) during ultraviolet (UV) photolysis. It was found that the degradation kinetics of RNTD and NZTD exhibited pH-dependent trends, in accordance with their deprotonation equilibria. The neutral species of RNTD and NZTD were more photo-reactive than their corresponding deprotonated species, with their specific fluence-based first-order rate constants varying in the range of 5...
April 19, 2017: Water Research
https://www.readbyqxmd.com/read/28436824/efficient-treatment-of-aniline-containing-wastewater-in-bipolar-membrane-microbial-electrolysis-cell-fenton-system
#16
Xiaohu Li, Xiangdan Jin, Nannan Zhao, Irini Angelidaki, Yifeng Zhang
Aniline-containing wastewater can cause significant environmental problems and threaten the humans's life. However, rapid degradation of aniline with cost-efficient methods remains a challenge. In this work, a novel microbial electrolysis cell with bipolar membrane was integrated with Fenton reaction (MEC-Fenton) for efficient treatment of real wastewater containing a high concentration (4460 ± 52 mg L(-1)) of aniline. In this system, H2O2 was in situ electro-synthesized from O2 reduction on the graphite cathode and was simultaneously used as source of OH for the oxidation of aniline wastewater under an acidic condition maintained by the bipolar membrane...
April 19, 2017: Water Research
https://www.readbyqxmd.com/read/28436682/kinetics-biochemical-and-factorial-analysis-of-chromium-uptake-in-a-multi-ion-system-by-tradescantia-pallida-rose-d-r-hunt
#17
Vibha Sinha, Kannan Pakshirajan, N Arul Manikandan, Rakhi Chaturvedi
Effluent from electroplating and leather industries is a major concern for the environment due to the presence of chromium (Cr) and other ions, such as sulphate, nitrate, phosphate, etc., which needs to be regulated prior to its discharge into the environment. This study evaluated the potential of Tradescantia pallida, a plant species known for its Cr bioaccumulation, for the simultaneous removal of Cr(6+), SO4(2-), NO3(-) and PO4(3-). Different combination levels of Cr(6+) and the co-ions were planned as per the Plackett-Burman design of experiments performed using hydroponics system...
April 24, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28436672/kinetic-energy-density-as-a-predictor-of-hydrogen-bonded-oh-stretching-frequencies
#18
Joseph R Lane, Anne Schou Hansen, Kasper Mackeprang, Henrik Grum Kjærgaard
This work considers the nature of the intermolecular hydrogen bond in a series of 15 different complexes with OH donor groups and N, O, P or S acceptor atoms. To complement the existing literature, room temperature gas phase vibrational spectra of the methanol-pyridine, ethanol-pyridine and 2,2,2-trifluoroethanol-pyridine complexes were recorded. These complexes were chosen as they exhibit hydrogen bonds of intermediate strength as compared to previous investigations that involved strong or weak hydrogen bonds...
April 24, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28436660/efficient-charge-separation-of-cold-charge-transfer-states-in-organic-solar-cells-through-incoherent-hopping
#19
Stavros Athanasopoulos, Steffen Tscheuschner, Heinz Bässler, Anna Köhler
We demonstrate that efficient and nearly field-independent charge separation of electron-hole pairs in organic planar heterojunction solar cells can be described by an incoherent hopping mechanism. Using kinetic Monte Carlo simulations that include the effect of on-chain delocalization as well as entropic contributions, we simulate the dissociation of the charge-transfer state in polymer-fullerene bilayer solar cells. The model further explains experimental results of almost field independent charge separation in bilayers of molecular systems with fullerenes and provides important guidelines at the molecular level for maximizing the efficiencies of organic solar cells...
April 24, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28436513/self-inverted-reciprocation-of-an-oil-droplet-on-a-surfactant-solution
#20
Yusuke Satoh, Yoshimi Sogabe, Katsuhiko Kayahara, Shinpei Tanaka, Masaharu Nagayama, Satoshi Nakata
Self-motion of an oil droplet was investigated on a sodium dodecyl sulfate (SDS) aqueous phase. With an increase in the concentration of SDS, the nature of self-motion of a butyl salicylate (BS) droplet as the oil droplet was changed, i.e., no motion, reciprocation with a small amplitude, and reciprocation with a large amplitude, which was a value close to the half-length of the chamber. The interfacial tension, contact angle, and convective flow around the droplet were measured to clarify the driving force of reciprocation...
April 24, 2017: Soft Matter
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