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https://www.readbyqxmd.com/read/27914369/dna-tetrahedral-scaffolds-based-platform-for-the-construction-of-electrochemiluminescence-biosensor
#1
Qiu-Mei Feng, Zhen Zhou, Mei-Xing Li, Wei Zhao, Jing-Juan Xu, Hong-Yuan Chen
Proximal metallic nanoparticles (NPs) could quench the electrochemiluminescence (ECL) emission of semiconductor quantum dots (QDs) due to Förster energy transfer (FRET), but at a certain distance, the coupling of light-emission with surface plasmon resonance (SPR) result in enhanced ECL. Thus, the modification strategies and distances control between QDs and metallic NPs are critical for the ECL intensity of QDs. In this strategy, a SPR enhanced ECL sensor based on DNA tetrahedral scaffolds modified platform was reported for the detection of telomerase activity...
November 27, 2016: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/27912113/titanium-dioxide-and-cadmium-sulfide-co-sensitized-graphitic-carbon-nitride-nanosheets-composite-photocatalysts-with-superior-performance-in-phenol-degradation-under-visible-light-irradiation
#2
Jinhua Yao, Huan Chen, Fang Jiang, Zhongyi Jiao, Mingchang Jin
In this work, TiO2-CdS-gCNNSs heterojunction photocatalysts were successfully synthesized. CdS was deposited on the surface of gCNNSs via electrostatic attraction; TiOC, TiOCO and TiON bonds were produced in TiO2-CdS-gCNNSs, strengthening the interaction between TiO2 and gCNNSs. The TiO2-CdS-gCNNSs photocatalyst showed excellent photocatalytic activity for phenol degradation under visible-light irradiation, which was higher than that of CdS-gCNNSs, CdS-TiO2 and TiO2-gCNNSs. The improved photocatalytic performance of TiO2-CdS-gCNNSs was ascribed to more adsorption sites, enhanced light harvesting ability and effective separation rate of electron-hole pairs...
November 15, 2016: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/27910224/separating-and-identifying-the-four-stereoisomers-of-methyl-jasmonate-by-rp-hplc-and-using-cyclodextrins-in-a-novel-way
#3
Adrián Matencio, Mario J Bermejo-Gimeno, Francisco García-Carmona, José Manuel López-Nicolás
INTRODUCTION: Several authors have reported on the different bioactivities of methyl jasmonate (MeJA) stereoisomers. However, no simple, precise and cheap method for separating and identifying them using reversed-phase high performance liquid chromatography (RP-HPLC) has been developed. OBJECTIVE: (1) To create a simple, precise and cheap method for separating and identifying the four stereoisomers present in commercial racemic mixtures of MeJA and (2) to identify the four stereoisomers using molecular docking techniques and coinjection...
December 2, 2016: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/27907859/near-infrared-mediated-quantum-dots-and-paclitaxel-co-loaded-nanostructured-lipid-carriers-for-cancer-theragnostic
#4
Livesey David Olerile, Yongjun Liu, Bo Zhang, Tianqi Wang, Shengjun Mu, Jing Zhang, Lesego Selotlegeng, Na Zhang
Timing is an important factor in cancer management. Theragnostic systems have benefit of improving patients' life-quality by expediting therapeutic decisions. The objective of this study was to explore the potential of co-loaded [quantum dots (CdTe/CdS/ZnS) and paclitaxel] NLC (nanostructured lipid carriers) as a parenteral multifunctional delivery system. The co-loaded NLC was prepared by emulsion-evaporation and low temperature-solidification method utilising glyceryl monostearate, oleic acid, and soya phosphatidylcholine as lipid matrix...
November 24, 2016: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/27905619/highly-fluorescent-nitrogen-doped-carbon-dots-with-excellent-thermal-and-photo-stability-applied-as-invisible-ink-for-loading-important-information-and-anti-counterfeiting
#5
Yingbo Liu, Liang Zhou, Yanan Li, Ruiping Deng, Hongjie Zhang
High quantum yields (QY) and stable performances are prerequisites for implementing carbon dots in practical applications. In this study, we demonstrate that nitrogen-doped carbon dots (N-CDs), which were prepared via the hydrothermal treatment of citric acid (CA) and tris(hydroxymethyl)methyl aminomethane (Tris), have a high QY of 75%, together with excellent thermal and photo stability. These N-CDs deliver an excellent thermal stability performance over the temperature range of 25 °C to 95 °C, and even at a heating temperature of 90 °C for 360 min...
December 1, 2016: Nanoscale
https://www.readbyqxmd.com/read/27897445/journal-club-predictors-of-provider-response-to-clinical-decision-support-lessons-learned-from-the-medicare-imaging-demonstration
#6
Ivan K Ip, Ronilda Lacson, Keith Hentel, Sameer Malhotra, Jonathan Darer, Curtis Langlotz, Jonathan Weiss, Ali S Raja, Ramin Khorasani
OBJECTIVE: The efficacy of imaging clinical decision support (CDS) varies. Our objective was to identify CDS factors contributing to imaging order cancellation or modification. SUBJECTS AND METHODS: This pre-post study was performed across four institutions participating in the Medicare Imaging Demonstration. The intervention was CDS at order entry for selected outpatient imaging procedures. On the basis of the information entered, computerized alerts indicated to providers whether orders were not covered by guidelines, appropriate, of uncertain appropriateness, or inappropriate according to professional society guidelines...
November 29, 2016: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/27896898/assembling-polyoxo-titanium-clusters-and-cds-nanoparticles-to-a-porous-matrix-for-efficient-and-tunable-h2-evolution-activities-with-visible-light
#7
Zhiqiang Jiang, Jinxiu Liu, Meiyan Gao, Xi Fan, Lei Zhang, Jian Zhang
Polyoxo-titanium clusters (PTCs) are applied to construct highly efficient ternary PTC/CdS/MIL-101 visible-light-range H2 -evolution photocatalysts. The application of PTCs not only increases the photocatalytic activities but also provides a molecular tool to tune them.
November 29, 2016: Advanced Materials
https://www.readbyqxmd.com/read/27896590/improvement-in-thermal-stability-of-sucralose-by-%C3%AE-cyclodextrin-metal-organic-frameworks
#8
Nana Lv, Tao Guo, Botao Liu, Caifen Wang, Vikaramjeet Singh, Xiaonan Xu, Xue Li, Dawei Chen, Ruxandra Gref, Jiwen Zhang
PURPOSE: To explain thermal stability enhancement of an organic compound, sucralose, with cyclodextrin based metal organic frameworks. METHODS: Micron and nanometer sized basic CD-MOFs were successfully synthesized by a modified vapor diffusion method and further neutralized with glacial acetic acid. Sucralose was loaded into CD-MOFs by incubating CD-MOFs with sucralose ethanol solutions. Thermal stabilities of sucralose-loaded basic CD-MOFs and neutralized CD-MOFs were investigated using thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and high performance liquid chromatography with evaporative light-scattering detection (HPLC-ELSD)...
November 28, 2016: Pharmaceutical Research
https://www.readbyqxmd.com/read/27896144/clinical-decision-support-for-drug-related-events-moving-towards-better-prevention
#9
REVIEW
Sandra L Kane-Gill, Archita Achanta, John A Kellum, Steven M Handler
Clinical decision support (CDS) systems with automated alerts integrated into electronic medical records demonstrate efficacy for detecting medication errors (ME) and adverse drug events (ADEs). Critically ill patients are at increased risk for ME, ADEs and serious negative outcomes related to these events. Capitalizing on CDS to detect ME and prevent adverse drug related events has the potential to improve patient outcomes. The key to an effective medication safety surveillance system incorporating CDS is advancing the signals for alerts by using trajectory analyses to predict clinical events, instead of waiting for these events to occur...
November 4, 2016: World Journal of Critical Care Medicine
https://www.readbyqxmd.com/read/27892791/cardiovascular-profile-score-as-a-predictor-of-acute-intrapartum-non-reassuring-fetal-status-in-infants-with-congenital-heart-defects
#10
Takekazu Miyoshi, Shinji Katsuragi, Reiko Neki, Ken-Ichi Kurosaki, Isao Shiraishi, Michikazu Nakai, Kunihiro Nishimura, Jun Yoshimatsu, Tomoaki Ikeda
OBJECTIVES: To investigate the predictive factors of urgent cesarean delivery (CD) due to acute intrapartum non-reassuring fetal status (NRFS) in infants with congenital heart defects (CHDs). STUDY DESIGN: This was a retrospective review of 199 singletons prenatally diagnosed with a CHD and for whom vaginal delivery was attempted in our institution between 2007 and 2014. A cardiovascular profile (CVP) score was used to assess fetal heart failure. RESULTS: The number of urgent CDs due to NRFS was 37 (18...
November 28, 2016: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/27890358/nucleo-mitochondrial-interaction-of-yeast-in-response-to-cadmium-sulfide-quantum-dot-exposure
#11
Francesco Pasquali, Caterina Agrimonti, Luca Pagano, Andrea Zappettini, Marco Villani, Marta Marmiroli, Jason C White, Nelson Marmiroli
Cell sensitivity to quantum dots (QDs) has been attributed to a cascade triggered by oxidative stress leading to apoptosis. The role and function of mitochondria in animal cells are well understood but little information is available on the complex genetic networks that regulate nucleo-mitochondrial interaction. The effect of CdS QD exposure in yeast Saccharomyces cerevisiae was assessed under conditions of limited lethality (<10%), using cell physiological and morphological endpoints. Whole-genomic array analysis and the screening of a deletion mutant library were also carried out...
November 19, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27886758/sensing-tyrosine-enantiomers-by-using-chiral-cdse-cds-quantum-dots-capped-with-n-acetyl-l-cysteine
#12
Fang Gao, Shiyao Ma, Xincai Xiao, Yan Hu, Dan Zhao, Zhike He
Despite of the importance of enantiomers, the fluorescence sensing of enantiomers and the interpretation of the "preferential interaction" still remain insufficiently explored. In this study, we report the recognition of tyrosine (Tyr) enantiomers by chiral N-acetyl-L-cysteine (L-NAC) capped CdSe/CdS quantum dots (QDs) under alkaline experimental condition. L-Tyr could greatly quench the fluorescence of CdSe/CdS QDs, while D-Tyr displayed no effect on the fluorescence. The one-step synthesized chiral L-NAC-CdSe/CdS QDs demonstrated high selectivity for Tyr enantiomers...
January 15, 2017: Talanta
https://www.readbyqxmd.com/read/27886267/in-vivo-characterization-of-hair-and-skin-derived-carbon-quantum-dots-with-high-quantum-yield-as-long-term-bioprobes-in-zebrafish
#13
Jing-Hui Zhang, Aping Niu, Jing Li, Jian-Wei Fu, Qun Xu, De-Sheng Pei
Carbon quantum dots (CDs) were widely investigated because of their tunable fluorescence properties and low toxicity. However, so far there have been no reports on in vivo functional studies of hair and skin derived CDs. Here, hair derived CDs (HCDs) and skin derived CDs (SCDs) were produced by using human hair and pig skin as precursors. The quantum yields (QYs) of HCDs and SCDs were quite high, compared to citric acid derived CDs (CCDs). HCDs and SCDs possess optimal photostability, hypotoxicity and biocompatibility in zebrafish, indicating that HCDs and SCDs possess the capacity of being used as fluorescence probes for in vivo biological imaging...
November 25, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27879049/double-helix-structure-in-carrageenan-metal-hydrogels-a-general-approach-to-porous-metal-sulfides-carbon-aerogels-with-excellent-sodium-ion-storage
#14
Daohao Li, Dongjiang Yang, Xianfeng Yang, Yu Wang, Ziqi Guo, Yanzhi Xia, Shenglei Sun, Shaojun Guo
The metal sulfide-carbon nanocomposite is a new class of anode material for sodium ion batteries, but its development is restricted by its relative poor rate ability and cyclic stability. Herein, we report the use of double-helix structure of carrageenan-metal hydrogels for the synthesis of 3D metal sulfide (Mx Sy ) nanostructure/carbon aerogels (CAs) for high-performance sodium-ion storage. The method is unique, and can be used to make multiple Mx Sy /CAs (such as FeS/CA, Co9 S8 /CA, Ni3 S4 /CA, CuS/CA, ZnS/CA, and CdS/CA) with ultra-small nanoparticles and hierarchical porous structure by pyrolyzing the carrageenan-metal hydrogels...
November 23, 2016: Angewandte Chemie
https://www.readbyqxmd.com/read/27877888/lysosomal-ph-inducible-supramolecular-dissociation-of-polyrotaxanes-possessing-acid-labile-n-triphenylmethyl-end-groups-and-their-therapeutic-potential-for-niemann-pick-type-c-disease
#15
Atsushi Tamura, Kei Nishida, Nobuhiko Yui
Niemann-Pick type C (NPC) disease is characterized by the accumulation of cholesterol in lysosomes. We have previously reported that biocleavable polyrotaxanes (PRXs) composed of β-cyclodextrins (β-CDs) threaded onto a linear polymer capped with bulky stopper molecules via intracellularly cleavable linkers show remarkable cholesterol reducing effects in NPC disease patient-derived fibroblasts owing to the stimuli-responsive intracellular dissociation of PRXs and subsequent β-CD release from the PRXs. Herein, we describe a series of novel acid-labile 2-(2-hydroxyethoxy)ethyl group-modified PRXs (HEE-PRXs) bearing terminal N-triphenylmethyl (N-Trt) groups as a cleavable component for the treatment of NPC disease...
2016: Science and Technology of Advanced Materials
https://www.readbyqxmd.com/read/27875578/transcriptome-analysis-of-the-chrysanthemum-foliar-nematode-aphelenchoides-ritzemabosi-aphelenchida-aphelenchoididae
#16
Yu Xiang, Dong-Wei Wang, Jun-Yi Li, Hui Xie, Chun-Ling Xu, Yu Li
The chrysanthemum foliar nematode (CFN), Aphelenchoides ritzemabosi, is a plant parasitic nematode that attacks many plants. In this study, a transcriptomes of mixed-stage population of CFN was sequenced on the Illumina HiSeq 2000 platform. 68.10 million Illumina high quality paired end reads were obtained which generated 26,817 transcripts with a mean length of 1,032 bp and an N50 of 1,672 bp, of which 16,467 transcripts were annotated against six databases. In total, 20,311 coding region sequences (CDS), 495 simple sequence repeats (SSRs) and 8,353 single-nucleotide polymorphisms (SNPs) were predicted, respectively...
2016: PloS One
https://www.readbyqxmd.com/read/27875170/towards-unambiguous-edge-bundling-investigating-confluent-drawings-for-network-visualization
#17
Benjamin Bach, Nathalie Henry Riche, Christophe Hurter, Kim Marriott, Tim Dwyer
In this paper, we investigate Confluent Drawings (CD), a technique for bundling edges in node-link diagrams based on network connectivity. Edge-bundling techniques are designed to reduce edge clutter in node-link diagrams by coalescing lines into common paths or bundles. Unfortunately, traditional bundling techniques introduce ambiguity since edges are only bundled by spatial proximity, rather than network connectivity; following an edge from its source to its target can lead to the perception of incorrect connectivity if edges are not clearly separated within the bundles...
January 2017: IEEE Transactions on Visualization and Computer Graphics
https://www.readbyqxmd.com/read/27874123/bacteria-derived-fluorescent-carbon-dots-for-microbial-live-dead-differentiation
#18
Xian-Wu Hua, Yan-Wen Bao, Hong-Yin Wang, Zhan Chen, Fu-Gen Wu
Microbial viability assessment plays a key role in many areas such as pathogen detection, infectious disease treatment and antimicrobial drug development. Many conventional viability dyes (such as propidium iodide, PI) used for differentiating live/dead microbes suffer from notable cytotoxicity, poor photostability and are of high cost. Thus their applications for accurate microbial viability determination are limited. Herein, for the first time we report the successful synthesis of fluorescent carbon dots (CDs) from bacteria via one-step hydrothermal carbonization...
November 22, 2016: Nanoscale
https://www.readbyqxmd.com/read/27872918/distance-mediated-electrochemiluminescence-enhancement-of-cds-thin-films-induced-by-the-plasmon-coupling-of-gold-nanoparticle-dimers
#19
Mei-Xing Li, Wei Zhao, Guang-Sheng Qian, Qiu-Mei Feng, Jing-Juan Xu, Hong-Yuan Chen
Gold nanoparticle dimers assembled on the surface of CdS QD thin films served as nano-antennas to mediate the distance-dependent plasmon enhanced electrochemiluminescence of QDs.
December 6, 2016: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/27872851/developmental-toxicity-of-carbon-quantum-dots-to-the-embryos-larvae-of-rare-minnow-gobiocypris-rarus
#20
Yuan-Yuan Xiao, Li Liu, Yao Chen, Yu-Lian Zeng, Ming-Zhi Liu, Li Jin
The toxic effects of CDs on rare minnow (Gobiocypris rarus) embryos at different developmental stages were investigated. The results showed that rare minnow embryos had decreased spontaneous movements, body length, increased heart rate, pericardial edema, yolk sac edema, tail/spinal curvature, various morphological malformations, and decreased hatching rate. Biochemical analysis showed the CDs exposure significantly inhibited the activity of Na(+)/K(+)-ATPase and Ca(2+)-ATPase and increased the MDA contents and the activity of SOD, CAT, and GPX...
2016: BioMed Research International
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