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https://www.readbyqxmd.com/read/28103517/a-noninvasive-cancer-detection-strategy-based-on-gold-nanoparticle-surface-enhanced-raman-spectroscopy-of-urinary-modified-nucleosides-isolated-by-affinity-chromatography
#1
Shangyuan Feng, Zuci Zheng, Yuanji Xu, Jinyong Lin, Guannan Chen, Cuncheng Weng, Duo Lin, Sufang Qiu, Min Cheng, Zufang Huang, Lan Wang, Rong Chen, Shusen Xie, Haishan Zeng
The search for tumor biomarkers in the urine for cancer diagnosis is currently a hot topic in clinical oncology, with potential for cancer screening and diagnosis. Modified nucleosides excreted through the urine are considered to be a general tumor marker for various cancer types. Herein, we explore a new method that utilizes surface-enhanced Raman scattering (SERS) spectroscopy to obtain a complete biochemical profile of urinary modified nucleosides. In our method, modified nucleosides are first isolated from urine sample utilizing the excellent separation ability of affinity chromatography; then supplemented with gold (Au) nanoparticles as substrate for SERS spectroscopy analysis...
January 5, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28103046/food-protein-based-core-shell-nanocarriers-for-oral-drug-delivery-effect-of-shell-composition-on-in-vitro-and-in-vivo-functional-performance-of-zein-nanocarriers
#2
Mohammed S Alqahtani, Md Saiful Islam, Satheesh Podaralla, Radhey S Kaushik, Joshua J Reineke, Tofuko Woyengo, Omathanu Perumal
The study was aimed at systematically investigating the influence of shell composition on the particle size, stability, release, cell uptake, permeability and in-vivo gastrointestinal distribution of food protein-based nanocarriers for oral delivery applications. Three different core-shell nanocarriers were prepared using food-grade biopolymers including zein-casein (ZC) nanoparticles, zein-lactoferrin (ZLF) nanoparticles and zein-PEG (ZPEG) micelles. Nile red was used as a model hydrophobic dye for in-vitro studies...
January 19, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28103045/photocurrent-generation-of-reconstituted-photosystem-ii-on-self-assembled-gold-film
#3
Mariko Miyachi, Shu Ikehira, Daiki Nishiori, Yoshinori Yamanoi, Masato Yamada, Masako Iwai, Tatsuya Tomo, Suleyman I Allakhverdiev, Hiroshi Nishihara
Photosystem II (PSII) modified gold electrodes were prepared by the deposition of PSII reconstituted with platinum nanoparticles (PtNPs) on Au electrodes. PtNPs modified with 1-[15-(3,5,6-trimethyl-1,4-benzoquinone-2-yl)]pentadecyl disulfide ((TMQ(CH2)15S)2) were incorporated into the QB site of PSII isolated from the thermophilic cyanobacterium, Thermosynechococcus elongatus. The reconstitution was confirmed by QA-reoxidation measurements. PSII reconstituted with PtNPs was deposited and integrated on a Au(111) surface modified with 4,4'-biphenyldithiol...
January 19, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28103021/efficient-removal-of-methane-over-the-cobalt-monoxide-doped-aupd-nanocatalysts
#4
Shaohua Xie, Yuxi Liu, Jiguang Deng, Simiao Zang, Zhenhua Zhang, Hamidreza Arandiyan, Hongxing Dai
Catalytic total oxidation of CH4 at a relatively low temperature over the precious metal (e.g., Pd-, Rh- or Pt)-based catalyst is believed to be a potential technology for the removal of greenhouse gas CH4. The traditional Pd-based catalysts for CH4 combustion reported in the literature tend to deactivate at high temperatures (> 600 °C), because the PdOx active phase is easily changed into aggregated metallic Pd nanoparticles (NPs). The high cost of Pd also limits its wide applications. In order to overcome such drawbacks, we herein design a novel pathway by introducing a certain amount of CoO to the supported Au-Pd alloy NPs to generate high-performance Au-Pd-xCoO/3DOM Co3O4 (x is the Co/Pd molar ratio) catalysts...
January 19, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28103014/reactive-oxygen-species-and-glutathione-dual-redox-responsive-supramolecular-assemblies-with-controllable-release-capability
#5
Yang Kang, Xin Ju, Li-Sheng Ding, Sheng Zhang, Bang-Jing Li
A dual redox and bio-relevant triggered supramolecular system is developed through the non-covalent host-guest interactions between the ferrocene (Fc) on camptothecin (CPT) and β-cyclodextrin (β-CD) at the end of methoxy polyethylene glycol (mPEG). The two segments can form a stable non-covalent supramolecular block copolymer mPEG-β-CD/Fc-CPT, which could further self-assemble into stable micelles in aqueous solution. Interestingly, these supramolecular micelles showed uniform sphere structure, high and constant drug loading content, hyper-fast redox-responsive drug release, and exhibited equal cellular proliferation inhibition toward A549 cancer cells, while the cytotoxicity evaluation of mPEG-β-CD indicated good biocompatibility...
January 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28102964/plasmonic-chirality-imprinting-on-nucleobase-displaying-supramolecular-nanohelices-by-metal-nucleobase-recognition
#6
Yiyang Lin, E Thomas Pashuck, Michael R Thomas, Nadav Amdursky, Shih-Ting Wang, Lesley W Chow, Molly M Stevens
Supramolecular self-assembly is an important process that enables the conception of complex structures mimicking biological motifs. Herein, we constructed helical fibrils through chiral self-assembly of nucleobase-peptide conjugates (NPCs), where achiral nucleobases are helically displayed on the surface of fibrils, comparable to polymerized nucleic acids. Selective binding between DNA and the NPC fibrils was observed with fluorescence polarization. Taking advantage of metal-nucleobase recognition, we highlight the possibility of deposition/assembly of plasmonic nanoparticles onto the fibrillar constructs...
January 19, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28102776/targeted-delivery-of-cisplatin-to-tumor-xenografts-via-the-nanoparticle-component-of-nano-diamino-tetrac
#7
Thangirala Sudha, Dhruba J Bharali, Murat Yalcin, Noureldien He Darwish, Melis Debreli Coskun, Kelly A Keating, Hung-Yun Lin, Paul J Davis, Shaker A Mousa
AIM: Nano-diamino-tetrac (NDAT) targets a receptor on integrin αvβ3; αvβ3 is generously expressed by cancer cells and dividing endothelial cells and to a small extent by nonmalignant cells. The tetrac (tetraiodothyroacetic acid) of NDAT is covalently bound to a poly(lactic-co-glycolic acid) nanoparticle that encapsulates anticancer drugs. We report NDAT delivery efficiency of cisplatin to agent-susceptible urinary bladder cancer xenografts. MATERIALS & METHODS: Cisplatin-loaded NDAT (NDAT-cisplatin) was administered to xenograft-bearing nude mice...
January 19, 2017: Nanomedicine
https://www.readbyqxmd.com/read/28102612/nickel-nanoparticles-encapsulated-in-few-layer-nitrogen-doped-graphene-derived-from-metal-organic-frameworks-as-efficient-bifunctional-electrocatalysts-for-overall-water-splitting
#8
You Xu, Wenguang Tu, Bowei Zhang, Shengming Yin, Yizhong Huang, Markus Kraft, Rong Xu
Nickel nanoparticles encapsulated in few-layer nitrogen-doped graphene (Ni@NC) have been synthesized by using a Ni-based metal-organic framework as the precursor for high-temperature annealing treatment. The resulting Ni@NC materials exhibit highly efficient and ultrastable electrocatalytic activity toward hydrogen evolution reaction and oxygen evolution reaction as well as overall water splitting in alkaline environment.
January 19, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28102576/printable-functional-chips-based-on-nanoparticle-assembly
#9
REVIEW
Yu Huang, Wenbo Li, Meng Qin, Haihua Zhou, Xingye Zhang, Fengyu Li, Yanlin Song
With facile manufacturability and modifiability, impressive nanoparticles (NPs) assembly applications were performed for functional patterned devices, which have attracted booming research attention due to their increasing applications in high-performance optical/electrical devices for sensing, electronics, displays, and catalysis. By virtue of easy and direct fabrication to desired patterns, high throughput, and low cost, NPs assembly printing is one of the most promising candidates for the manufacturing of functional micro-chips...
January 2017: Small
https://www.readbyqxmd.com/read/28102565/development-of-novel-sers-probe-for-selective-screening-of-healthy-prostate-from-malignant-prostate-cancer-cells-using-zn-ii
#10
Paresh Chandra Ray, Avijit Pramanik, Suhash Reddy Chavva, Bhanu Priya Viraka Nellore, Kelli May, Tejus Matthew, Stacy Jones, Aruna Vangara
Even in 21st century, prostate cancer remains the second leading cause of cancer death for men. Since normal prostate gland contains the most Zn(II) and there are huge differences in Zn(II) content between the healthy and malignant prostate cancer cells, mobile zinc can be used as a biomarker for prostate cancer prediction. Current article reports the design of novel and highly efficient surface enhanced Raman spectroscopy (SERS) probe using p-(imidazole)azo) benzenethiol attached gold nanoparticle as a Raman reporter, which has the capability to identify prostate cancer cells based on Zn(II) sensing...
January 19, 2017: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/28102524/heat-transfer-capability-of-ethylene-glycol-water-based-nanofluids-containing-graphene-nanoplatelets-design-and-thermophysical-profile
#11
D Cabaleiro, L Colla, S Barison, L Lugo, L Fedele, S Bobbo
This research aims at studying the stability and thermophysical properties of nanofluids designed as dispersions of sulfonic acid-functionalized graphene nanoplatelets in an (ethylene glycol + water) mixture at (10:90)% mass ratio. Nanofluid preparation conditions were defined through a stability analysis based on zeta potential and dynamic light scattering (DLS) measurements. Thermal conductivity, dynamic viscosity, and density were experimentally measured in the temperature range from 283.15 to 343.15 K and nanoparticle mass concentrations of up to 0...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28102523/the-effect-of-superparamagnetic-iron-oxide-nanoparticle-surface-charge-on-antigen-cross-presentation
#12
Yongbin Mou, Yun Xing, Hongyan Ren, Zhihua Cui, Yu Zhang, Guangjie Yu, Walter J Urba, Qingang Hu, Hongming Hu
Magnetic nanoparticles (NPs) of superparamagnetic iron oxide (SPIO) have been explored for different kinds of applications in biomedicine, mechanics, and information. Here, we explored the synthetic SPIO NPs as an adjuvant on antigen cross-presentation ability by enhancing the intracellular delivery of antigens into antigen presenting cells (APCs). Particles with different chemical modifications and surface charges were used to study the mechanism of action of antigen delivery. Specifically, two types of magnetic NPs, γFe2O3/APTS (3-aminopropyltrimethoxysilane) NPs and γFe2O3/DMSA (meso-2, 3-Dimercaptosuccinic acid) NPs, with the same crystal structure, magnetic properties, and size distribution were prepared...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28102403/janus-pegylated-gold-nanoparticles-a-robust-colorimetric-probe-for-sensing-nitrite-ions-in-complex-samples
#13
Yanmei Xiong, Mingmin Li, Huiqiao Liu, Zhihong Xuan, Jie Yang, Dingbin Liu
We presented a Janus PEGylated AuNP probe where PEGs and recognition ligands (e.g., 4-aminobenzenethiol, 4-ABT) were asymmetrically functionalized on an AuNP. With this design, the probes showed high colloidal stability, signal robustness, specificity, and sufficient sensitivity in the determination of NO2(-) in various complex samples.
January 19, 2017: Nanoscale
https://www.readbyqxmd.com/read/28102397/highly-exposed-fe-n4-active-sites-in-porous-poly-iron-phthalocyanine-based-oxygen-reduction-electrocatalyst-with-ultrahigh-performance-for-air-cathode
#14
Ganesan Anandhababu, Syed Comail Abbas, Jiangquan Lv, Kui Ding, Qin Liu, Dickson D Babu, Yiyin Huang, Jiafang Xie, Maoxiang Wu, Yaobing Wang
Progress in the development of efficient electrocatalysts for oxygen reduction reactions is imperative for various energy systems such as metal-air batteries and fuel cells. In this paper, an innovative porous two-dimensional (2D) poly-iron-phthalocyanine (PFe-Pc) based oxygen reduction electrocatalyst created with a simple solid-state chemical reaction without pyrolysis is reported. In this strategy, silicon dioxide nanoparticles play a pivotal role in preserving the Fe-N4 structure during the polymerization process and thereby assist in the development of a porous structure...
January 19, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28102394/markedly-enhanced-visible-light-photocatalytic-h2-generation-over-g-c3n4-nanosheets-decorated-by-robust-nickel-phosphide-ni12p5-cocatalysts
#15
Jiuqing Wen, Jun Xie, Rongchen Shen, Xin Li, XingYi Luo, Hongdan Zhang, Aiping Zhang, Guican Bi
In the present work, nickel phosphide (Ni12P5) modified graphitic carbon nitride (g-C3N4) nanosheets were synthesized by a simple grinding method. The structural characterization clearly proved that Ni12P5 nanoparticles were well loaded on the surface of g-C3N4 nanosheets. The photocatalytic activity of the composites was tested by catalyzing the reduction of water to hydrogen under visible light irradiation. The results demonstrate that Ni12P5 is an efficient co-catalyst for photocatalytic H2 production of g-C3N4 nanosheets...
January 19, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28102334/cofe2o4-mil-100-fe-hybrid-magnetic-nanoparticles-exhibit-fast-and-selective-adsorption-of-arsenic-with-high-adsorption-capacity
#16
Ji-Chun Yang, Xue-Bo Yin
In this study, we report the synthesis and application of mesoporous CoFe2O4@MIL-100(Fe) hybrid magnetic nanoparticles (MNPs) for the simultaneous removal of inorganic arsenic (iAs). The hybrid adsorbent had a core-shell and mesoporous structure with an average diameter of 260 nm. The nanoscale size and mesoporous character impart a fast adsorption rate and high adsorption capacity for iAs. In total, 0.1 mg L(-1) As(V) and As(III) could be adsorbed within 2 min, and the maximum adsorption capacities were 114...
January 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28102314/improved-solar-driven-photocatalytic-performance-of-highly-crystalline-hydrogenated-tio2-nanofibers-with-core-shell-structure
#17
Ming-Chung Wu, Ching-Hsiang Chen, Wei-Kang Huang, Kai-Chi Hsiao, Ting-Han Lin, Shun-Hsiang Chan, Po-Yeh Wu, Chun-Fu Lu, Yin-Hsuan Chang, Tz-Feng Lin, Kai-Hsiang Hsu, Jen-Fu Hsu, Kun-Mu Lee, Jing-Jong Shyue, Krisztián Kordás, Wei-Fang Su
Hydrogenated titanium dioxide has attracted intensive research interests in pollutant removal applications due to its high photocatalytic activity. Herein, we demonstrate hydrogenated TiO2 nanofibers (H:TiO2 NFs) with a core-shell structure prepared by the hydrothermal synthesis and subsequent heat treatment in hydrogen flow. H:TiO2 NFs has excellent solar light absorption and photogenerated charge formation behavior as confirmed by optical absorbance, photo-Kelvin force probe microscopy and photoinduced charge carrier dynamics analyses...
January 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28102176/synthesis-of-magnetic-cytosine-imprinted-chitosan-nanoparticles
#18
Mei-Hwa Lee, Arti Ahluwalia, Jian-Zhou Chen, Neng-Lang Shih, Hung-Yin Lin
Molecularly imprinted polymer nanoparticles incorporating magnetic nanoparticles (MNPs) have been investigated for their selective adsorption properties. Here we describe the synthesis and characterization of magnetic cytosine-imprinted chitosan nanoparticles (CIPs) for gene delivery. In particular, CIPs carrying the mammalian expression plasmid of enhanced green fluorescent protein were prepared by the co-precipitation of MNPs, chitosan and a template nucleobase (cytosine). The results show that the selective reabsorption of cytosine to magnetic CIPs was at least double that of non-imprinted polymers and other nucleobases (such as adenine and thymine)...
January 19, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28102031/dual-nano-sized-contrast-agents-in-pet-mri-a-systematic-review
#19
REVIEW
Afsaneh Lahooti, Saeed Sarkar, Sophie Laurent, Saeed Shanehsazzadeh
Nowadays molecular imaging plays a vital role in achieving a successful targeted and personalized treatment. Hence, the approach of combining two or more medical imaging modalities was developed. The objective of this review is to systematically compare recent dual contrast agents in Positron Emission Tomography (PET)/Magnetic Resonance Imaging (MRI) and in some cases Single photon emission computed tomography (SPECT)/MRI in terms of some their characteristics, such as tumor uptake, and reticuloendothelial system uptake (especially liver) and their relaxivity rates for early detection of primary cancer tumor...
November 2016: Contrast Media & Molecular Imaging
https://www.readbyqxmd.com/read/28101988/toxicity-assessment-of-zero-valent-iron-nanoparticles-on-artemia-salina
#20
Deepak Kumar, Rajdeep Roy, Abhinav Parashar, Ashok M Raichur, Natarajan Chandrasekaran, Anita Mukherjee, Amitava Mukherjee
The present study deals with the toxicity assessment of two differently synthesized zero valent iron nanoparticles (nZVI, chemical and biological) as well as Fe(2+) ions on Artemia salina at three different initial concentrations of 1, 10, and 100 mg/L of these particles. The assessment was done till 96 h at time intervals of 24 h. EC50 value was calculated to evaluate the 50% mortality of Artemia salina at all exposure time durations. Between chemically and biologically synthesized nZVI nanoparticles, insignificant differences in the level of mortality were demonstrated...
January 19, 2017: Environmental Toxicology
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