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https://www.readbyqxmd.com/read/29778083/performance-of-single-pass-and-by-pass-multi-step-multi-soil-layering-systems-for-low-c-n-ratio-polluted-river-water-treatment
#1
Cai-Jie Wei, Wei-Zhong Wu
Two kinds of hybrid two-step multi-soil-layering (MSL) systems loaded with different filter medias (zeolite-ceramsite MSL-1 and ceramsite-red clay MSL-2) were set-up for the low-(C/N)-ratio polluted river water treatment. A long-term pollutant removal performance of these two kinds of MSL systems was evaluated for 214 days. By-pass was employed in MSL systems to evaluate its effect on nitrogen removal enhancement. Zeolite-ceramsite single-pass MSL-1 system owns outstanding ammonia removal capability (24 g NH4 + -Nm-2 d-1 ), 3 times higher than MSL-2 without zeolite under low aeration rate condition (0...
May 7, 2018: Chemosphere
https://www.readbyqxmd.com/read/29778081/molecular-aspect-of-silver-nanoparticles-regulated-embryonic-development-in-zebrafish-danio-rerio-by-oct-4-expression
#2
Biplab Sarkar, Suresh K Verma, Javed Akhtar, Surya Prakash Netam, Sanjay Kr Gupta, Pritam Kumar Panda, Koel Mukherjee
With the enhancement of commercial manifestation of silver nanoparticles, concerned has risen on their accumulation in aquatic system and consequent effects on fish development and metabolism. In this study, experiments were conducted to assess the impacts of silver nanoparticles on early life cycles of fish considering Zebrafish (Danio rerio) as experimental model. Silver nanoparticles were synthesized through chemical reduction method and characterized through UV-visible spectroscopy, dynamic light scattering (DLS), and HR-TEM...
May 4, 2018: Chemosphere
https://www.readbyqxmd.com/read/29778074/how-does-free-ammonia-based-sludge-pretreatment-improve-methane-production-from-anaerobic-digestion-of-waste-activated-sludge
#3
Dongbo Wang, Bowen Liu, Xuran Liu, Qiuxiang Xu, Qi Yang, Yiwen Liu, Guangming Zeng, Xiaoming Li, Bing-Jie Ni
Previous studies reported that free ammonia (FA) pretreatment could improve methane production from anaerobic digestion of waste activated sludge (WAS) effectively. However, details of how FA pretreatment improves methane production are poorly understood. This study therefore aims to reveal the underlying mechanisms of FA pretreatment affecting anaerobic digestion of WAS through a series of batch tests using either real sludge or synthetic media as the digestion substrates at different pH values. At pH 8.5 level, with an increase of FA level from 18...
May 10, 2018: Chemosphere
https://www.readbyqxmd.com/read/29778072/nmr-at-pressures-up-to-90-gpa
#4
Thomas Meier, Saiana Khandarkhaeva, Sylvain Petitgirard, Thomas Körber, Alexander Lauerer, Ernst Rössler, Leonid Dubrovinsky
The past 15 years have seen an astonishing increase in Nuclear Magnetic Resonance (NMR) sensitivity and accessible pressure range in high-pressure NMR experiments, owing to a series of new developments of NMR spectroscopy applied to the diamond anvil cell (DAC). Recently, with the application of electro-magnetic lenses, so-called Lenz lenses, in toroidal diamond indenter cells, pressures of up to 72 GPa with NMR spin sensitivities of about 1012  spin/Hz1/2 has been achieved. Here, we describe the implementation of a refined NMR resonator structure using a pair of double stage Lenz lenses driven by a Helmholtz coil within a standard DAC, allowing to measure sample volumes as small as 100 pl prior to compression...
May 14, 2018: Journal of Magnetic Resonance
https://www.readbyqxmd.com/read/29778064/is-the-limit-cycle-attractor-an-almost-invariable-characteristic-in-human-walking
#5
Kim-Charline Broscheid, Christian Dettmers, Manfred Vieten
BACKGROUND: Common methods of gait analyses measure step length/width, gait velocity and gait variability to name just a few. Those parameters tend to be changing with fitness and skill of the subjects. But, do stable subject characteristic parameters in walking exist? Does the Limit-Cycle-Attractor qualify as such a parameter?. RESEARCH QUESTION: The attractor method is a new approach focusing on the dynamics of human motion. It classifies the fundamental walking pattern by calculating the Limit-Cycle-Attractor and its variability from acceleration data of the feet...
May 16, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29778050/the-association-between-ptsd-and-facial-affect-recognition
#6
Christian L Williams, Melissa E Milanak, Matt R Judah, Howard Berenbaum
The major aims of this study were to examine how, if at all, having higher levels of PTSD would be associated with performance on a facial affect recognition task in which facial expressions of emotion are superimposed on emotionally valenced, non-face images. College students with trauma histories (N = 90) completed a facial affect recognition task as well as measures of exposure to traumatic events, and PTSD symptoms. When the face and context matched, participants with higher levels of PTSD were significantly more accurate...
May 5, 2018: Psychiatry Research
https://www.readbyqxmd.com/read/29778044/electrodeposited-styrylquinolinium-dye-as-molecular-electrocatalyst-for-coupled-redox-reactions
#7
Yolina Hubenova, Rumyana Bakalska, Mario Mitov
Modification of carbonaceous materials with different conductive coatings is a successful approach to enhance their electrocatalytic activity and thus to increase the electrical outputs when used as electrodes in biofuel cells. In this study, a methodology for electrodeposition of styrylquinolinium dye on carbon felt was developed. The produced dye electrodeposits were characterized by means of AFM, ESI-MS/MS and NMR spectroscopy. The obtained data reveal that the dye forms overlaid layers consisting of monomer molecules most likely with an antiparallel orientation...
May 10, 2018: Bioelectrochemistry
https://www.readbyqxmd.com/read/29778036/polymeric-nanoparticles-as-a-platform-for-permeability-enhancement-of-class-iii-drug-amikacin
#8
Saman Fatima, Zeenat Iqbal, A K Panda, M Samim, Sushama Talegaonkar, Farhan Jalees Ahmad
Amikacin (A), a water soluble aminoglycoside antibiotic is commercially available for intravenous administration only. Present investigation is aimed at the development of poly-lactic-co-glycolic acid (PLGA) nanoparticles (A-NPs).1 for oral permeability enhancement of amikacin. The pharmaceutical attributes of the A-NPs revealed particle size, 260.3 ± 2.05 nm, zeta potential, -12.9 ± 1.12 mV and drug content, 40.10 ± 1.87 μg/mg with spherical shape and smooth surface. In vitro antibacterial studies showed that the A-NPs were active against P...
May 16, 2018: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29778025/combined-different-dehydration-pretreatments-and-torrefaction-to-upgrade-fuel-properties-of-hybrid-pennisetum-pennisetum-americanum-%C3%A3-p-purpureum
#9
Yan Yu, Guanghui Wang, Xiaopeng Bai, Jude Liu, Decheng Wang, Zhiqin Wang
Different dehydrating methods combined with torrefaction were investigated to find the underlying mechanism that how dehydration process influence the degree of hornification. Hybrid pennisetum was selected as the experiment material. Oven-dried sample (ODS), crushed dried sample (CDS), and sun-cured dried sample (SDS) were torrefied under the temperature of 275 °C and 300 °C with the duration time of 60 min. The results showed that, changes in elevated carbon content and higher heating value (HHV) and reduced oxygen content of SDS were the most obvious under identical torrefaction conditions...
May 16, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29778022/low-cost-composited-accelerants-for-anaerobic-digestion-of-dairy-manure-focusing-on-methane-yield-digestate-utilization-and-energy-evaluation
#10
Chen Zhang, Sining Yun, Xue Li, Ziqi Wang, Hongfei Xu, Tingting Du
To improve the methane yield and digestate utilization of anaerobic digestion (AD), low-cost composited accelerants consisting of urea (0.2-0.5%), bentonite (0.5-0.8%), active carbon (0.6-0.9%), and plant ash (0.01-0.3%) were designed and tested in batch experiments. Total biogas yield (485.7-681.9 mL/g VS) and methane content (63.0-66.6%) were remarkably enhanced in AD systems by adding accelerants compared to those of control group (361.9 mL/g VS, 59.4%). Composited accelerant addition led to the highest methane yield (454...
May 11, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29778020/eosin-y-sensitized-core-shell-tio-2-zno-nano-structured-photoanodes-for-dye-sensitized-solar-cell-applications
#11
V S Manikandan, Akshaya K Palai, Smita Mohanty, Sanjay K Nayak
In the current investigation, TiO2 and TiO2 -ZnO (core-shell) spherical nanoparticles were synthesized by simple combined hydrolysis and refluxing method. A TiO2 core nanomaterial on the shell material of ZnO was synthesized by utilizing variable ratios of ZnO. The structural characterization of TiO2 -ZnO core/shell nanoparticles were done by XRD analysis. The spherical structured morphology of the TiO2 -ZnO has been confirmed through field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM) studies...
May 3, 2018: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29778016/multiscale-reconstruction-of-a-synthetic-biomimetic-micro-niche-for-enhancing-and-monitoring-the-differentiation-of-stem-cells
#12
Rui Li, Jinming Li, Jianbin Xu, Dexter Siu Hong Wong, Xiaoyu Chen, Weihao Yuan, Liming Bian
Stem cells reside in a three-dimensional (3D) niche microenvironment, which provides specific cues, including cell-matrix interactions and soluble factors, that are essential to the differentiation of stem cells in vivo. Herein we demonstrate a general approach to the synthetic reconstruction of 3D biomimetic niche environment of stem cells by the multiscale combination of macroscopic porous hydrogels and a nanoscale upconversion nanoparticles (UCNP)-based nanocomplex. The porous biopolymeric hydrogels emulate the spongy bone microstructure and provide 3D environment conducive to the differentiation of seeded stem cells...
May 4, 2018: Biomaterials
https://www.readbyqxmd.com/read/29778001/patchy-gold-coated-fe-3-o-4-nanospheres-with-enhanced-catalytic-activity-applied-for-paper-based-bipolar-electrode-electrochemiluminescence-aptasensors
#13
Xin Zhang, Ning Bao, Xiliang Luo, Shou-Nian Ding
In this work, novel multifunctional patchy gold coated Fe3 O4 hybrid nanoparticles (PG-Fe3 O4 NPs) have been successfully synthesized in aqueous medium via a facile adsorption-reduction method. A rational formation mechanism has been proposed by monitoring the morphological evolution. The PG-Fe3 O4 NPs retained the good magnetic property and exhibited excellent catalytical effeciency towards the electrochemical reduction of hydrogen peroxide. Chronoamperometric and amperometric experiments indicated a relatively high catalytic rate constant of 3...
May 10, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29777997/rumen-fluid-fermentation-for-enhancement-of-hydrolysis-and-acidification-of-grass-clipping
#14
Siqi Wang, Guangming Zhang, Panyue Zhang, Xiaowen Ma, Fan Li, Haibo Zhang, Xue Tao, Junpei Ye, Mohammad Nabi
Rumen fluid, formed in rumen of ruminants, includes a complex microbial population of bacteria, protozoa, fungi and archaea, and has high ability to degrade lignocellulosic biomass. In this study, rumen fluid was used to ferment grass clipping for enhancing the hydrolysis and acidification of organic matters. Results showed that strict anaerobic condition, higher grass clipping content and smaller particle size of grass clipping were beneficial to the hydrolysis and acidification of organics. The increase of SCOD and total VFA concentration respectively reached 24...
May 16, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29777989/synthesis-antiproliferative-activity-and-mechanism-of-gallium-iii-thiosemicarbazone-complexes-as-potential-anti-breast-cancer-agents
#15
Jinxu Qi, Qian Yao, Kun Qian, Liang Tian, Zhen Cheng, Dongmei Yang, Yihong Wang
Five thiosemicarbazone ligands were synthesized and characterized by condensation with different aldehydes or ketones by 4-phenylthiosemicarbazone. The representative dichlorido[2-(Di-2-pyridinylmethylene)-Nphenylhydrazinecarbothioamide-N,N,S]-gallium(III) (Ga4) was characterized by X-ray single crystal diffraction, which was 1:1 ligand/Ga(III) complexes. The structure-activity relationship of these ligands and Ga (III) complexes have been investigated, and the results demonstrate that the formation of Ga (III) complexes have significant antiproliferative activity over the corresponding ligands...
May 14, 2018: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29777987/phthalocyanine-sulfonamide-conjugates-synthesis-and-photodynamic-inactivation-of-gram-negative-and-gram-positive-bacteria
#16
Raquel Nunes da Silva, Ângela Cunha, Augusto C Tomé
Phthalocyanines bearing four or eight sulfonamide units were synthesized and their efficiency in the photodynamic inactivation of Gram-negative (Escherichia coli) and Gram-positive (Staphylococcus aureus) bacteria was evaluated. Conjugates with simpler sulfonamide units (N,N-diethylbenzenesulfonamide, N-isopropylbenzenesulfonamide and N-(4-methoxyphenyl)benzenesulfonamide) caused stronger inactivation than those with heterocyclic groups (N-(thiazol-2-yl)benzenesulfonamide) or long alkyl chains (N-dodecylbenzenesulfonamide) in both bacteria...
May 9, 2018: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29777973/preparation-of-amine-functionalized-reduced-graphene-oxide-methyl-diethanolamine-nanofluid-and-its-application-for-improving-the-co-2-and-h-2-s-absorption
#17
Vahid Irani, Ahmad Tavasoli, Mehdi Vahidi
A novel approach was examined by addition of amine-modified reduced graphene oxide (rGO) to amine solutions in order to enhance the CO2 absorption capacity of amine solutions. Amine functionalized reduced graphene oxide (rGO)/methyl diethanolamine (MDEA) nanofluid was prepared for absorption of acid gases (CO2 , H2 S). GO was synthesized via a modified hummer method and functionalized through solvothermal method. As-synthesized NH2 -rGO was characterized by XRD, BET, SEM, FTIR, EDX and XPS analysis to determine the structure...
May 12, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29777972/adsorption-kinetics-of-heptadecafluoro-1-nonanol-phase-transition-and-mixed-control
#18
Alvin Casandra, Boris A Noskov, Min-Yu Hu, Shi-Yow Lin
HYPOTHESIS: The adsorption kinetics of heptadecafluoro-1-nonanol (C9 H2 F17 OH) onto a clean air-water interface at low surfactant concentrations (equilibrium surface tension, γ(C) > 65 mN/m) has been reported, and the controlling mechanism was found to be mixed diffusive-kinetic controlled (Kuo et al., JCIS 402 (2013) 131). However, it remains to be determined what the adsorption kinetics are at higher concentrations. Hence, the dynamic surface tension, γ(t) of C9 H2 F17 OH was measured and compared with the theoretical γ(t) curves predicted from phase transition model...
May 12, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29777958/sssupramolecular-poly-acrylic-acid-f127-hydrogel-with-hydration-controlled-nitric-oxide-release-for-enhancing-wound-healing
#19
Mathilde Champeau, Valéria Póvoa, Lucas Militão, Flávia Cabrini, Guilherme F Picheth, Florian Meneau, Carlos P Jara, Eliana P de Araujo, Marcelo G de Oliveira
Topical nitric oxide (NO) delivery has been shown to accelerate wound healing. However, delivering NO to wounds at appropriate rates and doses requires new biomaterial-based strategies. Here, we describe the development of supramolecular interpolymer complex hydrogels comprising PEO-PPO-PEO (F127) micelles embedded in a poly(acrylic acid) (PAA) matrix, with S-nitrosoglutathione (GSNO) molecules dissolved in the hydrophilic domain. We show that PAA:F127/GSNO hydrogels start releasing NO upon hydration at rates controlled by their rates of water absorption...
May 16, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29777957/dual-ph-reduction-responsive-hybrid-polymeric-micelles-for-targeted-chemo-photothermal-combination-therapy
#20
Linhua Zhang, Yu Qin, Zhiming Zhang, Fan Fan, Chenlu Huang, Li Lu, Hai Wang, Xu Jin, Hanxue Zhao, Deling Kong, Chun Wang, Hongfan Sun, Xigang Leng, Dunwan Zhu
The combination of chemotherapy and photothermal therapy in multifunctional nanovesicles has emerged as a promising strategy to improve cancer therapeutic efficacy. Herein, we designed new pH/reduction dual-responsive and folate decorated polymeric micelles (FA Co-PMs) as theranostic nanocarrier to co-encapsulate doxorubicin (DOX) and indocyanine green (ICG) for targeted NIR imaging and chemo-photothermal combination therapy. The Co-PMs exhibited nano-sized structure (∼100 nm) with good monodispersity, high encapsulation efficiency of both ICG and DOX, triggered DOX release in response to acid pH and reduction environment, and excellent temperature conversion with laser irradiation...
May 16, 2018: Acta Biomaterialia
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