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https://www.readbyqxmd.com/read/29793208/enhanced-phosphate-removal-from-wastewater-by-using-in-situ-generated-fresh-trivalent-fe-composition-through-the-interaction-of-fe-ii-on-caco-3
#1
Yujie Li, Xiaoman He, Huimin Hu, Tingting Zhang, Jun Qu, Qiwu Zhang
Excessive existences of nutrients such as phosphate in the aqueous environment remain as a heavy concern although many researches have been reported for dealing with their removal. Based on the understanding toward the interactions of Fe compounds with phosphate and carbonate from many available researches, we designed a very simple and efficient approach for phosphate removal by using in situ generated fresh trivalent Fe composition through the interaction of Fe(II) as FeSO4 on CaCO3 . Addition and agitation of Fe(II) and CaCO3 simultaneously to phosphate solution allowed an amorphous Fe(III)-P or Ca-Fe(III)-P precipitation, with a phosphate removal rate close to 100%, to reduce the residual phosphorus concentration less than 0...
May 21, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29793170/effective-size-selection-of-mos-2-nanosheets-by-a-novel-liquid-cascade-centrifugation-influences-of-the-flakes-dimensions-on-electrochemical-and-photoelectrochemical-applications
#2
Marzieh Kajbafvala, Mansoor Farbod
Although liquid phase exfoliation is a powerful method to produce MoS2 nanosheets in large scale, but its effectiveness is limited by the diversity of produced nanosheets sizes. Here a novel approach for separation of MoS2 flakes having various lateral sizes and thicknesses based on the cascaded centrifugation has been introduced. This method involves a pre-separation step which is performed through low-speed centrifugation to avoid the deposition of large area single and few-layers by the heavier particles...
May 14, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29792962/effect-of-casein-and-inulin-addition-on-physico-chemical-characteristics-of-low-fat-camel-dairy-cream
#3
Leila Ziaeifar, Mohsen Labbafi Mazrae Shahi, Maryam Salami, Gholam R Askari
The effect of the addition of the camel casein fraction on some physico-chemical properties of low fat camel milk cream was studied. Oil-in-water emulsions, 25, 30, and 35 (w/w) fat, were prepared using inulin, camel skim milk, milk fat and variable percentages of casein (1, 2, and 3% w/w). The droplet size, ζ-potential, surface protein concentration, viscosity and surface tension of low fat dairy creams was measured. Cream containing 2% (w/w) casein had better stability. The modifications in physico-chemical properties appeared to be driven by changes in particle size distribution caused by droplet aggregation...
May 21, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29792691/the-role-of-small-nanoparticles-on-the-formation-of-hot-spots-under-microwave-assisted-hydrothermal-heating
#4
Gema Cabello, Rogério A Davoglio, Luis G Cuadrado
Herein, we report a detailed study of microwave-matter interaction focused on the role of small nanoparticles and the effects on microwave thermal heating. We have used a model reaction (degradation of methylene blue) to study the influence of temperature, size, and catalytic properties of the nanoparticles in the potential formation of hot spots. Total mineralization was achieved after 3 h microwave heating at 200 °C in the presence of 2 nm TiO2 nanoparticles (92% calculated TOC decay), but the reaction resulted in a mixture of intermediates (52% TOC decay) in the absence of TiO2 ...
May 24, 2018: Inorganic Chemistry
https://www.readbyqxmd.com/read/29792676/dramatic-increase-in-polymer-glass-transition-temperature-under-extreme-nanoconfinement-in-weakly-interacting-nanoparticle-films
#5
Haonan Wang, Jyo Lyn Hor, Yue Zhang, Tianyi Liu, Daeyeon Lee, Zahra Fakhraai
Properties of polymers in polymer nanocomposites and nanopores have been shown to deviate from their respective bulk properties due to chain confinement as well as polymer-particle interfacial interactions. However, separating the confinement effects from the interfacial effects under extreme nanoconfinement is experimentally challenging. Capillary Rise Infiltration (CaRI) enables polymer infiltration into nanoparticle (NP) packings, thereby confining polymers within extremely small pores and dramatically increasing the interfacial area, providing a unique system to systematically distinguish the role of each effect on polymer properties...
May 24, 2018: ACS Nano
https://www.readbyqxmd.com/read/29792337/titanium-dioxide-nanoparticles-induce-in-vitro-autophagy
#6
X Dai, R Liu, N Li, J Yi
AIM: Concerns about the possible toxicity to environment and human health of titanium dioxide nanoparticles (TiO2 NPs) are increasing. The aim of this study was to investigate the relationship between toxicology and autophage in vitro. METHODS: RAW 264.7 cells were exposed to five concentrations (50, 100, 200, 300, and 400 μg/mL) and two particle size of TiO2 NPs (30 and 100 nm) for 24 h. RESULTS: The results showed that TiO2 NPs decreased cell viability, phagocytic rate, and phagocytic index in a concentration-dependent manner, thereby inducing autophagy...
January 1, 2018: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/29792331/predictable-particle-engineering-programming-the-energy-level-carrier-generation-and-conductivity-of-core-shell-particles
#7
Conghui Yuan, Tong Wu, Jie Mao, Ting Chen, Yuntong Li, Min Li, Yiting Xu, Birong Zeng, Weiang Luo, Lingke Yu, Gaofeng Zheng, Lizong Dai
Core-shell structures are of particular interest in the development of advanced composite materials as they can efficiently bring different components together at nanoscale. The advantage of this structure greatly relies on the crucial design of both core and shell, thus achieving an inter-component synergistic effect. In this report, we show that decorating semiconductor nanocrystals with a boronate polymer shell can easily achieve programmable core-shell interactions. Taking ZnO and anatase TiO2 nanocrystals as inner core examples, the effective core-shell interactions can narrow the band gap of semiconductor nanocrystals, change the HOMO and LUMO levels of boronate polymer shell and significantly improve the carrier density of core-shell particles...
May 24, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29792324/photochemical-formation-and-transformation-of-birnessite-effects-of-cations-on-micromorphology-and-crystal-structure
#8
Tengfei Zhang, Lihu Liu, WenFeng Tan, Steven L Suib, Guohong Qiu, Fan Liu
As important components with excellent oxidation and adsorption activity in soils and sediments, manganese oxides affect the transportation and fate of nutrients and pollutants in natural environments. In this work, birnessite was formed by photocatalytic oxidation of Mn2+aq in the presence of nitrate under solar irradiation. The effects of concentrations and species of interlayer cations (Na+, Mg2+, and K+) on birnessite crystal structure and micromorphology were investigated. The roles of adsorbed Mn2+ and pH in the transformation of the photosynthetic birnessite were further studied...
May 24, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29792029/stratification-in-drying-films-containing-bidisperse-mixtures-of-nanoparticles
#9
Yanfei Tang, Gary S Grest, Shengfeng Cheng
Large scale molecular dynamics simulations for bidisperse nanoparticle suspensions with an explicit solvent are used to investigate the effects of evaporation rates and volume fractions on the nanoparticle distribution during drying. Our results show that "small-on-top" stratification can occur when Pes Φs ≥ c with c ∼ 1, where Pes is the Péclet number and Φs is the volume fraction of the smaller particles. This threshold of Pes Φs for "small-on-top" is larger by a factor of ~ α2 than the prediction of the model treating solvent as an implicit viscous background, where α is the size ratio between the large and small particles...
May 23, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29791875/effects-of-potassium-application-on-potato-starch-physicochemical-properties
#10
Wei Zhang, Xinwei Liu, Qiaolan Wang, Haiqing Zhang, Mingfeng Li, Botao Song, Zhuqing Zhao
Potato starch serves as an excellent raw material or food additive in the food industry. With the advancement of the potato staple food strategy in China, improving the potato starch yield and quality has attracted more and more attention. Potassium is an essential nutrient for potato due to its direct effects on the yield and quality of potato tubers. Here, the effects of three different potassium levels on potato starch physicochemical properties were evaluated by field experiments. With increasing potassium application rates, the amylose content, phosphorus content and particle size decreased, thereby resulting in low gelatinization temperature, breakdown and setback viscosity, and high swelling power, relative crystallinity and transparency...
May 20, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29791803/bacteria-activated-janus-particles-driven-by-chemotaxis
#11
Zihan Huang, Pengyu Chen, Guo-Long Zhu, Ye Yang, Ziyang Xu, Li-Tang Yan
In the development of biocompatible nano/micro-motors for drug and cargo delivery, motile bacteria represent an excellent energy source for biomedical applications. Despite intense research of the fabrication of bacteria-based motors, how to effectively utilize the instinctive responses of bacteria to environmental stimuli in the fabrication process, particularly, chemotaxis, remains an urgent and critical issue. Here, by developing a molecular-dynamics model of bacterial chemotaxis, we present an investigation of the transport of a bacteria-activated Janus particle driven by chemotaxis...
May 23, 2018: ACS Nano
https://www.readbyqxmd.com/read/29791241/neutrophil-mediated-delivery-of-pixantrone-loaded-liposomes-decorated-with-poly-sialic-acid-octadecylamine-conjugate-for-lung-cancer-treatment
#12
Xiang Luo, Ling Hu, Huangliang Zheng, Mingqi Liu, Xinrong Liu, Cong Li, Qiujun Qiu, Zitong Zhao, Xiaobo Cheng, Chaoyang Lai, Yuqing Su, Yihui Deng, Yanzhi Song
Poly(sialic acid) (PSA) is a natural hydrophilic biodegradable and non-immunogenic biopolymer, receptors for its monomer are expressed on peripheral blood neutrophils (PBNs), which plays important roles in the progression and invasion of tumors. A poly(sialic acid)-octadecylamine conjugate (PSA-ODA) was synthesized and then anchor it on the surface of liposomal pixantrone (Pix-PSL), to achieve an improved anticancer effect. The liposomes were prepared using a remote loading method via a pH gradient, and then assessed for particle size, zeta potential encapsulation efficiency, in vitro release, and in vitro cytotoxicity...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/29790935/intake-and-feed-utilization-in-two-breeds-of-pregnant-beef-cows-fed-forages-with-high-fiber-concentrations
#13
M Jardstedt, A Hessle, P Nørgaard, L Frendberg, E Nadeau
Hereford and Charolais beef cows (n = 24 per breed) were used to study the effect of breed and to evaluate how late cut reed canarygrass (RC) and whole-crop oats plus urea (WCO) compared to late cut timothy (TG) with respect to feed intake and digestibility, rumination time, fecal particle size (PS) distribution, N excretion, and ruminal microbial CP production (MCP). The TG and RC were cut at flowering and WCO at hard dough stage of maturity. Cows were group-housed, six groups per breed, and fed the three diets ad libitum in three periods...
May 22, 2018: Journal of Animal Science
https://www.readbyqxmd.com/read/29790801/development-and-characterization-of-polymeric-microparticle-of-poly-d-l-lactic-acid-loaded-with-holmium-acetylacetonate
#14
Mariangela de Burgos M de Azevedo, Vitor H S de Melo, Carlos Roberto J Soares, Douglas M Miyamoto, Ricardo A Katayama, Peterson L Squair, Caio H N Barros, Ljubica Tasic
Biodegradable polymers containing radioactive isotopes such as Holmium 166 (166 Ho) have potential applications as beta particle emitters in tumor tissues. It is also a gamma ray emitter, allowing nuclear imaging of any tissue to be acquired. It is frequently used in the form of complexes such as holmium acetylacetonate (HoAcAc), which may cause damages in tissues next to the targets cancer cells, as it is difficult to control its linkage or healthy tissues radiotherapy effects. Poly(D,L-lactic acid), PDLLA, was used to encapsulate holmium acetylacetonate (HoAcAc) using an emulsion solvent extraction/evaporation technique...
May 23, 2018: Journal of Microencapsulation
https://www.readbyqxmd.com/read/29790664/the-dynamics-of-a-healthy-and-infected-red-blood-cell-in-flow-through-constricted-channels-a-dpd-simulation
#15
Sazid Zamal Hoque, D V Anand, B S V Patnaik
Understanding the dynamics of red blood cell (RBC) motion under in-silico conditions is central to the development of cost effective diagnostic tools. Specifically, unraveling the relationship between the rheological properties and the nature of shape change in the RBC (healthy or infected) can be extremely useful. In case of malarial infection, RBC progressively loses its deformability and tends to occlude the microvessel. In the present study, detailed mesoscopic simulations are performed to investigate the deformation dynamics of a RBC in flow through a constricted channel...
May 23, 2018: International Journal for Numerical Methods in Biomedical Engineering
https://www.readbyqxmd.com/read/29790581/the-pharmacokinetics-pharmacodynamics-and-tolerability-of-pur0200-a-novel-tiotropium-formulation-in-chronic-obstructive-pulmonary-disease
#16
Dave Singh, Arjun Ravi, Katie Kane, Tess Schmalbach, David L Hava
AIMS: PUR0200 is a tiotropium bromide formulation engineered with the iSPERSE dry powder delivery technology. PUR0200 is being developed as a bioequivalent alternative to tiotropium bromide delivered using Spiriva® HandiHaler® (HH). We investigated the bronchodilator effects, pharmacokinetics and safety of PUR0200 in COPD patients. METHODS: This was a randomised, placebo-controlled, crossover study with different PUR0200 doses and the comparator tiotropium HH...
May 23, 2018: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/29789878/nuts-as-a-replacement-for-carbohydrates-in-the-diabetic-diet-a-reanalysis-of-a-randomised-controlled-trial
#17
David J A Jenkins, Cyril W C Kendall, Benoît Lamarche, Monica S Banach, Korbua Srichaikul, Edward Vidgen, Sandy Mitchell, Tina Parker, Stephanie Nishi, Balachandran Bashyam, Russell J de Souza, Christopher Ireland, Sathish C Pichika, Joseph Beyene, John L Sievenpiper, Robert G Josse
AIMS/HYPOTHESIS: In line with current advice, we assessed the effect of replacing carbohydrate consumption with mixed nut consumption, as a source of unsaturated fat, on cardiovascular risk factors and HbA1c in type 2 diabetes. The data presented here are from a paper that was retracted at the authors' request ( https://doi.org/10.2337/dc16-rt02 ) owing to lack of adjustment for repeated measures in the same individual. Our aim, therefore, was to fix the error and add new complementary data of interest, including information on clotting factors and LDL particle size...
May 23, 2018: Diabetologia
https://www.readbyqxmd.com/read/29789837/size-effects-on-rhodium-nanoparticles-related-to-hydrogen-storage-capability
#18
Chulho Song, Anli Yang, Osami Sakata, L S R Kumara, Satoshi Hiroi, Yi-Tao Cui, Kohei Kusada, Hirokazu Kobayashi, Hiroshi Kitagawa
To unveil the origin of the hydrogen-storage properties of rhodium nanoparticles (Rh NPs), we investigated the electronic and crystal structures of the Rh NPs using various synchrotron based X-ray techniques. Electronic structure studies revealed that the hydrogen-storage capability of Rh NPs could be attributed to their more unoccupied d-DOSs than that of the bulk near the Fermi level. Crystal structure studies indicated that lattice distortion and mean-square displacement increase while coordination number decreases with decreasing particle size and the hydrogen-absorption capability of Rh NPs improves to a greater extent with increased structural disorder in the local structure than with that in the mean structure...
May 23, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29789412/effect-of-a-nebulizer-holding-chamber-on-aerosol-delivery
#19
Rania M Sarhan, Ahmed A Elberry, Nada Saed Abdelwahab, Hoda Rabea, Mohamed Nabil Salem, Mohamed Ea Abdelrahim
BACKGROUND: A new holding chamber was designed to be used with the Aerogen Solo nebulizer to increase the aerosol emitted that reach the patient. The aim of this study was to evaluate the efficacy of this holding chamber with Solo nebulizer and determine its usability with other nebulizers. METHODS: The study was divided into 2 parts. In the first part, aerosol emitted of 1 mL respirable solution (nominal dose of 5000 μg salbutamol), delivered by using the Solo nebulizer, Pro nebulizer, and jet nebulizer, connected to a T-piece or a holding chamber, was determined by using a breathing simulator set to provide a tidal volume of 500 mL, frequency of 15 breaths/min, and the inspiratory-expiratory ratio of 1:1 for adults as the quiet breathing pattern...
May 22, 2018: Respiratory Care
https://www.readbyqxmd.com/read/29789161/synthesis-of-silver-containing-calcium-aluminate-particles-and-their-effects-on-a-mta-based-endodontic-sealer
#20
Luiza Helena S Almeida, Rafael R Moraes, Renata D Morgental, Sérgio S Cava, Wellington Luiz O Rosa, Patrícia Rodrigues, Anderson S Ribeiro, Marcus Só, Fernanda G Pappen
OBJECTIVE: To synthetize calcium aluminate (C3A) and silver-containing C3A particles (C3A+Ag) testing their effects on the properties of a MTA-based endodontic sealer in comparison to an epoxy resin- and a calcium silicate-based sealer. METHODS: Pure C3A and C3A+Ag particles were synthesized by a chemical method and characterized using XRD to identify crystalline phases. SEM/EDS analysis investigated morphology, particle size, and elemental composition of particles...
May 19, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
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