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https://www.readbyqxmd.com/read/29161670/construction-of-plasmonic-ag-modified-phosphorous-doped-ultrathin-g-c3n4-nanosheets-bivo4-photocatalyst-with-enhanced-visible-near-infrared-response-ability-for-ciprofloxacin-degradation
#1
Yaocheng Deng, Lin Tang, Chengyang Feng, Guangming Zeng, Jiajia Wang, Yaoyu Zhou, Yani Liu, Bo Peng, Haopeng Feng
To realize the full utilization of solar energy, the design of highly efficient photocatalyst with improved visible-near-infrared photocatalysis performance has attracted great attentions for environment pollutant removal. In this work, we rationally employed the surface plasmon resonance effect of metallic Ag in the phosphorus doped ultrathin g-C3N4 nanosheets (PCNS) and BiVO4 composites to construct a ternary Ag@PCNS/BiVO4 photocatalyst. It was applied for the photodegradation of ciprofloxacin (CIP), exhibiting 92...
November 15, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29160412/exosomes-promote-cetuximab-resistance-via-the-pten-akt-pathway-in-colon-cancer-cells
#2
S Zhang, Y Zhang, J Qu, X Che, Y Fan, K Hou, T Guo, G Deng, N Song, C Li, X Wan, X Qu, Y Liu
Cetuximab is widely used in patients with metastatic colon cancer expressing wildtype KRAS. However, acquired drug resistance limits its clinical efficacy. Exosomes are nanosized vesicles secreted by various cell types. Tumor cell-derived exosomes participate in many biological processes, including tumor invasion, metastasis, and drug resistance. In this study, exosomes derived from cetuximab-resistant RKO colon cancer cells induced cetuximab resistance in cetuximab-sensitive Caco-2 cells. Meanwhile, exosomes from RKO and Caco-2 cells showed different levels of phosphatase and tensin homolog (PTEN) and phosphor-Akt...
November 13, 2017: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/29160328/unravelling-the-energy-transfer-of-er-3-self-sensitized-upconversion-in-er-3-yb-3-er-3-clustered-core-shell-nanoparticles
#3
Bolong Huang, Mingzi Sun, Alan William Dougherty, Hao Dong, Yue-Jiao Xu, Ling-Dong Sun, Chun-Hua Yan
Unravelling upconversion (UC) energy transfer mechanisms is significant for designing novel efficient anti-Stokes phosphors. We have studied the correlation of different lanthanide dopants within Er(3+)-self-sensitized core@shell upconversion nanoparticles (UCNPs). Here, our focus will be on high-concentration dopants that are able to sufficiently produce the clustering effect, especially within the interplay between Er(3+) and Yb(3+). We demonstrate that whatever the amount of the self-sensitizer (e.g., Er(3+)), abnormal absorption enhancement will occur as long as Yb(3+) clusters are present...
November 21, 2017: Nanoscale
https://www.readbyqxmd.com/read/29159222/data-on-metagenomic-profiles-of-activated-sludge-from-a-full-scale-wastewater-treatment-plant
#4
Jianhua Guo, Bing-Jie Ni, Xiaoyu Han, Xueming Chen, Philip Bond, Yongzhen Peng, Zhiguo Yuan
The data in this article mainly present the sequences of activated sludge from a full-scale municipal wastewater treatment plant (WWTP) carrying out simultaneous nitrogen and phosphorous removal in Beijing, China. Data include the operational conditions and performance, dominant microbes and taxonomic analysis in this WWTP, and function annotation results based on SEED, Clusters of Orthologous Groups (COG), and Kyoto Encyclopedia of Genes and Genomes (KEGG) databases. Sequencing data were generated by using Illumina HiSeq...
December 2017: Data in Brief
https://www.readbyqxmd.com/read/29158188/experimental-use-of-an-acrolein-based-primer-as-collagen-cross-linker-for-dentine-bonding
#5
Tatjana Maravic, Lorenzo Breschi, Allegra Comba, Sandra Ribeiro Cunha, Valeria Angeloni, Cesare Nucci, Josimeri Hebling, David Pashley, Franklin Tay, Annalisa Mazzoni
OBJECTIVES: The objective of the present study was to investigate the long-term effect of 0.01% acrolein (ACR) aqueous solution, employed as an additional primer, on the mechanical durability and enzymatic activity of resin-dentine interfaces created with a simplified etch-and-rinse adhesive. METHODS: Dentine surfaces were etched with 35% phosphoric acid for 15sec, rinsed and blot-dried. Specimens were then assigned to: Group 1: dentine pre-treated with 0.01% ACR aqueous solution for 1min and bonded with Adper Scotchbond 1 XT (SB1XT), a 2-step etch-and-rinse adhesive; Group 2: SB1XT was applied on untreated acid-etched dentine (control)...
November 17, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/29156273/contribution-of-sun-exposure-to-the-vitamin-d-dose-received-by-various-groups-of-the-spanish-population
#6
Maria-Antonia Serrano
Although the harmful effects of excessive exposure to solar ultraviolet (UV) radiation are well known, the recommended dose of UV radiation is beneficial for the synthesis of vitamin D by the skin, in addition to being useful in the treatment of various illnesses and mental problems. Numerous studies have shown that vitamin D performs important functions in the human organism, such as absorbing calcium and phosphorous and contributing to the immune system, among others. Several studies have found that a high percentage of various groups of the Spanish population suffer from vitamin D deficiency, and since very few natural foods contain vitamin D, it was considered important to determine whether groups such as schoolchildren, outdoor workers and athletes, receive enough solar radiation to produce adequate levels of vitamin D in their daily activities...
November 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29156251/optically-and-thermally-stimulated-luminescence-characteristics-of-laalo3-pr-3-beta-irradiated
#7
M A de León-Alfaro, A Morales-Hernández, J Roman-Lopez, J Zarate-Medina, T Rivera-Montalvo
This paper reports on an investigation into the thermally stimulated luminescence (TL) and optically stimulated luminescence (OSL) characteristics of novel luminescent phosphor. A new Pr(3+)-doped, lanthanum aluminate (LaAlO3)-based luminescent phosphor is developed. Samples of LaAlO3:Pr(3+) were irradiated to beta doses, in air, from 0.1Gy up to 50Gy and then were analyzed using both TL and continuous wavelength OSL (CW-OSL) techniques to determine their luminescent characteristics. This phosphor shows a TL glow curve, after its irradiation to beta radiation, with two TL peaks: one located around 160°C and a second at 300°C...
November 14, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/29149422/interrelationships-among-hydrogen-permeation-physiochemical-properties-and-early-adsorption-abilities-of-titanium
#8
Fang Jia, Lei Zhou, Wangxi Wu
This study aimed to investigate if the titanium samples with low hydrogen permeation which treated with a novel etching combination: phosphoric acid and sodium fluoride could influence the surface physiochemical properties and early adsorption ability. Titanium samples were treated with three different concentrations of the new formula, as groups A, B and C, and treated with the traditional etching formula, as group T. Zeta potential, contact angle, X-ray photoelectron spectroscopy (XPS) and fibronectin (FN)/vitronectin (VN) adsorption of Sprague-Dawley (SD) rat tibial osteotomies in the initial 30min and MG-63 adsorption in the initial 24 h were detected...
November 17, 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/29149083/co-precipitation-synthesis-and-optical-properties-of-mn-4-doped-hexafluoroaluminate-w-led-phosphors
#9
Tim Senden, Robin G Geitenbeek, Andries Meijerink
Mn(4+)-activated hexafluoroaluminates are promising red-emitting phosphors for white light emitting diodes (w-LEDs). Here, we report the synthesis of Na₃AlF₆:Mn(4+), K₃AlF₆:Mn(4+) and K₂NaAlF₆:Mn(4+) phosphors through a simple two-step co-precipitation method. Highly monodisperse large (~20 μm) smoothed-octahedron shaped crystallites are obtained for K₂NaAlF₆:Mn(4+). The large size, regular shape and small size distribution are favorable for application in w-LEDs. All Mn(4+)-doped hexafluoroaluminates show bright red Mn(4+) luminescence under blue light excitation...
November 17, 2017: Materials
https://www.readbyqxmd.com/read/29148804/a-nanobionic-light-emitting-plant
#10
Seon-Yeong Kwak, Juan Pablo Giraldo, Min Hao Wong, Volodymyr Koman, Tedrick Lew, Jon Ell, Mark Weidman, Rosalie Sinclair, Markita P Landry, William A Tisdale, Michael S Strano
The engineering of living plants for visible light emission and sustainable illumination is compelling because plants possess independent energy generation and storage mechanisms and autonomous self-repair. Herein, we demonstrate a plant nanobionic approach that enables exceptional luminosity and lifetime utilizing four chemically-interacting nanoparticles, including firefly luciferase conjugated silica (SNP-Luc), D-luciferin releasing poly(lactic-co-glycolic acid) (PLGA-LH2), coenzyme A functionalized chitosan (CS-CoA) and semiconductor nanocrystal phosphors for longer wavelength modulation...
November 17, 2017: Nano Letters
https://www.readbyqxmd.com/read/29148736/formation-of-metal-cyanide-complexes-in-deliquescent-airborne-particles-a-new-possible-sink-for-hcn-in-urban-environments
#11
Chiara Giorio, Daniele Marton, Gianni Formenton, Andrea Tapparo
Hydrogen cyanide is a ubiquitous gas in the atmosphere and a biomass burning tracer. Reactive gasses can be adsorbed onto aerosol particles where they can promote heterogeneous chemistry. In the present study, we report for the first time on the measurement and speciation of cyanides in atmospheric aerosol. Filter samples were collected at an urban background site in the city center of Padua (Italy), extracted and analyzed with headspace gas chromatography and nitrogen-phosphorous detection. The results showed that strongly bound cyanides were present in all aerosol samples at a concentration ranging between 0...
November 17, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29148097/ce3-sensitized-tm3-mn2-doped-nayf4-colloidal-nanocrystals-intense-cool-white-light-from-phosphor-coated-uv-led
#12
Venkataramanan Mahalingam, Venkata N K B Adusumalli, Heramba V S R M Koppisetti
Intense white light emission is observed from colloidal single component NaYF4:Ce3+/Tm3+/Mn2+ nanocrystals. This combination is interesting as it uses Mn2+ ions instead of green and red emitting Ln3+ ions which are expensive and less abundant. The single band blue emission of Tm3+ ions was combined with the broadband greenish yellow emission of Mn2+ ions to produce strong white light emission using Ce3+ ions as excitation source. Interestingly, there is hardly any re-absorption of blue emission by Mn2+ ions and the spectrum matches the commercial Ce3+-doped YAG phosphor coated over blue LED...
November 17, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29148025/a-3-day-diary-of-dietary-protein-and-calorie-intake-by-serum-phosphate-concentration-and-binder-use-in-hemodialysis-patients
#13
Meiry J S Araújo, Luciana F Silva, Maria T S Martins, Cacia M Matos, Marcelo B Lopes, Rilma F S Santos, LarissaS Santos, Angiolina C Kraychete, Márcia T S Martins, Fernanda A Silva, Antonio A Lopes
INTRODUCTION: The use of phosphate binders to control hyperphosphatemia may allow diets less restricted in protein and calories for maintenance hemodialysis (MHD) patients. The study compared intakes of protein, calorie and phosphate among MHD patients with different serum phosphate concentrations, taking into account binder use. The hypothesis was that low serum phosphate would be associated with low intakes of protein and calories only in patients not on binders. METHODS: A cross-sectional study of 443 patients enrolled in the Prospective Study of the Prognosis of Chronic Hemodialysis Patients (PROHEMO) in Salvador, Brazil, with stratified sampling on serum phosphate: ≤3...
November 4, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/29145846/comparison-of-diagnostic-methods-for-early-interproximal-caries-detection-with-near-infrared-light-transillumination-an-in-vivo-study
#14
Ismail Hakki Baltacioglu, Kaan Orhan
BACKGROUND: Although numerous studies have used digital intraoral imaging, only a few studies have used photo-optical methods for the diagnosis of caries. Moreover, several limitations exist in terms of observers (experience and specialty) and the caries lesion itself. Hence, the aims of this study were to evaluate the diagnostic capability of near-infrared light transillumination (NILT) and PSP-Bitewing radiographs and to compare the interobserver and intraobserver differences in addition to observers' experience level to detect early interproximal caries lesions in vivo...
November 16, 2017: BMC Oral Health
https://www.readbyqxmd.com/read/29144587/characterization-of-complex-heterogeneous-lipid-a-samples-using-hplc-ms-ms-technique-iii-positive-ion-mode-tandem-mass-spectrometry-to-reveal-phosphorylation-and-acylation-patterns-of-lipid-a
#15
Viktor Sándor, Anikó Kilár, Ferenc Kilár, Béla Kocsis, Ágnes Dörnyei
In this study, we report the detailed analysis of the fragmentation patterns of positively charged lipid A species based on their tandem mass spectra obtained under low-energy collision-induced dissociation conditions of an electrospray quadrupole time-of-flight mass spectrometers. The tandem mass spectrometry experiments were performed after the separation of the compounds with a reversed-phase high performance liquid chromatography method. We found that both, phosphorylated and nonphosphorylated lipid A molecules can be readily ionized in the positive-ion mode by adduct formation with triethylamine added to the eluent...
November 16, 2017: Journal of Mass Spectrometry: JMS
https://www.readbyqxmd.com/read/29143263/enhanced-stabilization-of-pb-zn-and-cd-in-contaminated-soils-using-oxalic-acid-activated-phosphate-rocks
#16
Zhuo Zhang, Guanlin Guo, Mei Wang, Jia Zhang, Zhixin Wang, Fasheng Li, Honghan Chen
Phosphate amendments, especially phosphate rock (PR), are one of the most commonly used materials to stabilize heavy metals in contaminated soils. However, most of PR reserve consists of low-grade ore, which limits the efficiency of PR for stabilizing heavy metals. This study was to enhance the stabilization of heavy metals through improving the available phosphorous (P) release of PR by oxalic acid activation. Raw PR and activated PR (APR) were characterized by scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), X-ray powder diffraction (XRD), Brunauer-Emmett-Teller (BET) surface analysis, and laser diffraction to determine the changes of structure and composition of APR...
November 15, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29140719/effects-of-different-etching-methods-and-bonding-procedures-on-shear-bond-strength-of-orthodontic-metal-brackets-applied-to-different-cad-cam-ceramic-materials
#17
S Kutalmış Buyuk, Ahmet Serkan Kucukekenci
OBJECTIVE: To investigate the shear bond strength (SBS) of orthodontic metal brackets applied to different types of ceramic surfaces treated with different etching procedures and bonding agents. MATERIALS AND METHODS: Monolithic CAD/CAM ceramic specimens (N = 120; n = 40 each group) of feldspathic ceramic Vita Mark II, resin nanoceramic Lava Ultimate, and hybrid ceramic Vita Enamic were fabricated (14 × 12 × 3 mm). Ceramic specimens were separated into four subgroups (n = 10) according to type of surface treatment and bonding onto the ceramic surface...
November 15, 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/29140683/nanocomposite-phosphor-consisting-of-cai2-eu-2-single-nanocrystals-embedded-in-crystalline-sio2
#18
Hisayoshi Daicho, Takeshi Iwasaki, Yu Shinomiya, Akitoshi Nakano, Hiroshi Sawa, Wataru Yamada, Satoru Matsuishi, Hideo Hosono
High luminescence efficiency is obtained in halide- and chalcogenide-based phosphors, but they are impractical because of their poor chemical durability. Here we report a halide-based nanocomposite phosphor with excellent luminescence efficiency and sufficient durability for practical use. Our approach was to disperse luminescent single nanocrystals of CaI2:Eu(2+) in a chemically stable, translucent crystalline SiO2 matrix. Using this approach, we successfully prepared a nanocomposite phosphor by means of self-organization through a simple solid-state reaction...
November 15, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29136831/rapid-method-for-determination-of-90-sr-in-seawater-by-liquid-scintillation-counting-with-an-extractive-scintillator
#19
Masaki Uesugi, Ryosuke Watanabe, Hiroaki Sakai, Akihiko Yokoyama
A rapid determination method of (90)Sr is developed for the monitoring of seawater around the Fukushima Daiichi Nuclear Power Plant (FDNPP). Three ideas of chemical separation and measurements to accelerate (90)Sr analysis are investigated. Strontium is co-precipitated in a two-step procedure with hydroxyapatite after the removal of magnesium phosphate in the presence of citric acid. The purification process of strontium is in combination with solid phase extraction disks. One or two sheets of Sr Rad disk and cyclic operations are examined to eliminate interfering substances and secure the exchange capacity...
February 1, 2018: Talanta
https://www.readbyqxmd.com/read/29136585/white-emission-in-single-phase-ba2gd2si4o13-ce-3-eu-2-sm-3-phosphor-for-white-leds
#20
Xiumin Jiang, Yuqian Zhang, Jia Zhang
To develop new white-light-emitting phosphor, a series of Ce(3+)-Eu(2+)-Sm(3+) doped Ba2Gd2Si4O13 (BGS) phosphors were prepared by the solid-state reaction method, and their photoluminescence properties were studied. The Ce(3+) and Eu(2+) single-doped BGS show broad emission bands around in the region of 350-550 and 420-650nm, respectively. By co-doping Ce(3+)-Eu(2+) into BGS, the energy transfer (ET) from Ce(3+) to Eu(2+) is inefficient, which could be due to the competitive absorption between the two activator ions...
November 9, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
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