keyword
MENU ▼
Read by QxMD icon Read
search

RA nanoparticle

keyword
https://www.readbyqxmd.com/read/28045497/giant-temperature-coefficient-of-resistivity-and-cryogenic-sensitivity-in-silicon-with-galvanically-displaced-gold-nanoparticles-in-freeze-out-region
#1
Seung-Hoon Lee, Seongpil Hwang, Jae-Won Jang
The temperature coefficient of resistivity (TCR) and cryogenic sensitivity (Sv) of p-type silicon (p-Si) in the low-temperature region (10-30 K) are remarkably improved by increasing the coverage of galvanically displaced Au nanoparticles (NPs). By increasing the galvanic displacement time from 10 s to 30 s, the average surface roughness (Ra) of the samples increases from 0.31 to 2.31 nm, and the coverage rate of Au NPs increases from 3.1% to 21.9%. In the freeze-out region of the sample, an up to 35% increase of TCR and dramatically improved Sv of p-Si (~ 5785%) are observed with Au coverage of 21...
January 3, 2017: ACS Nano
https://www.readbyqxmd.com/read/28044470/gold-nanoparticles-as-dose-enhancement-agent-for-kilovoltage-x-ray-therapy-of-melanoma
#2
So-Ra Kim, Eun-Hee Kim
PURPOSE: Melanoma is mainly treated by surgery and rarely with radiation because of the high radio-resistance of this tumor. Nevertheless, radiotherapy is the preferred treatment modality for unresectable lesions and avoiding cosmetic disfigurement caused by surgical excision. This study investigated the therapeutic advantage of gold nanoparticles (AuNPs) for kilovoltage X-ray treatment of melanoma. MATERIALS AND METHODS: Commercial AuNPs were evaluated for cytotoxicity and cellular internalization...
January 3, 2017: International Journal of Radiation Biology
https://www.readbyqxmd.com/read/28000444/diagnosis-and-classification-of-17-diseases-from-1404-subjects-via-pattern-analysis-of-exhaled-molecules
#3
Morad K Nakhleh, Haitham Amal, Raneen Jeries, Yoav Y Broza, Manal Aboud, Alaa Gharra, Hodaya Ivgi, Salam Khatib, Shifaa Badarneh, Lior Har-Shai, Lea Glass-Marmor, Izabella Lejbkowicz, Ariel Miller, Samih Badarny, Raz Winer, John Finberg, Sylvia Cohen-Kaminsky, Frédéric Perros, David Montani, Barbara Girerd, Gilles Garcia, Gérald Simonneau, Farid Nakhoul, Shira Baram, Raed Salim, Marwan Hakim, Maayan Gruber, Ohad Ronen, Tal Marshak, Ilana Doweck, Ofer Nativ, Zaher Bahouth, Da-You Shi, Wei Zhang, Qing-Ling Hua, Yue-Yin Pan, Li Tao, Hu Liu, Amir Karban, Eduard Koifman, Tova Rainis, Roberts Skapars, Armands Sivins, Guntis Ancans, Inta Liepniece-Karele, Ilze Kikuste, Ieva Lasina, Ivars Tolmanis, Douglas Johnson, Stuart Z Millstone, Jennifer Fulton, John W Wells, Larry H Wilf, Marc Humbert, Marcis Leja, Nir Peled, Hossam Haick
We report on an artificially intelligent nanoarray based on molecularly modified gold nanoparticles and a random network of single-walled carbon nanotubes for noninvasive diagnosis and classification of a number of diseases from exhaled breath. The performance of this artificially intelligent nanoarray was clinically assessed on breath samples collected from 1404 subjects having one of 17 different disease conditions included in the study or having no evidence of any disease (healthy controls). Blind experiments showed that 86% accuracy could be achieved with the artificially intelligent nanoarray, allowing both detection and discrimination between the different disease conditions examined...
December 21, 2016: ACS Nano
https://www.readbyqxmd.com/read/27895468/increased-localized-delivery-of-piroxicam-by-cationic-nanoparticles-after-intra-articular-injection
#4
Sung Rae Kim, Myoung Jin Ho, Sang Hyun Kim, Ha Ra Cho, Han Sol Kim, Yong Seok Choi, Young Wook Choi, Myung Joo Kang
Piroxicam (PRX), a potent nonsteroidal anti-inflammatory drug, is prescribed to relieve postoperative and/or chronic joint pain. However, its oral administration often results in serious gastrointestinal adverse effects including duodenal ulceration. Thus, a novel cationic nanoparticle (NP) was explored to minimize the systemic exposure and increase the retention time of PRX in the joint after intra-articular (IA) injection, by forming micrometer-sized electrostatic clusters with endogenous hyaluronic acid (HA) in the synovial cavity...
2016: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/27755995/the-photobleaching-of-the-free-and-encapsulated-metallic-phthalocyanine-and-its-effect-on-the-photooxidation-of-simple-molecules
#5
Brenda Gomes Fanchiotti, Marcella Piffer Zamprogno Machado, Letícia Camilato de Paula, Mahmut Durmuş, Tebello Nyokong, Arlan da Silva Gonçalves, André Romero da Silva
The photobleaching of an unsubstituted phthalocyanine (gallium(III) phthalocyanine chloride (GaPc)) and a substituted phthalocyanine (1,4-(tetrakis[4-(benzyloxy)phenoxy]phthalocyaninato) indium(III) chloride (InTBPPc)) was monitored for the free photosensitizers and for the phthalocyanines encapsulated into nanoparticles of PEGylated poly(D,L-lactide-co-glycolide) (PLGA-PEG). Phosphate-buffered solutions (PBS) and organic solutions of the free GaPc or the free InTBPPc, and suspensions of each encapsulated photosensitizer (2-15μmol/L) were irradiated using a laser diode of 665nm with a power of 1-104mW and a light dose of 7...
December 2016: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/27736727/novel-self-assembled-tacrolimus-nanoparticles-cross-linking-thermosensitive-hydrogels-for-local-rheumatoid-arthritis-therapy
#6
Huimin Wu, Kaiyuan Wang, Hanning Wang, Fang Chen, Wencong Huang, Yuqi Chen, Jiali Chen, Jin Tao, Xiaoguang Wen, Subin Xiong
The aim was to explore the potential application of novel self-assembled nanoparticles cross-linking thermosensitive hydrogels composed of polyvinyl caprolactam-polyvinyl acetate-polyethylene glycol (Soluplus) and tacrolimus (FK-506) for local therapy of rheumatoid arthritis (RA). The sol-gel transition temperature (Tsol-gel), gelation time, rheological behaviors, in vitro release, in vivo gelation and retention, and therapeutic efficacy against adjuvant-induced arthritis (AIA) rats were compared between the Soluplus hydrogels and widely studied poloxamer 407 (P407) delivery systems...
January 1, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/27703610/silver-nanoparticles-in-resin-luting-cements-antibacterial-and-physiochemical-properties
#7
Ana-Paula-Rodrigues Magalhães, Francine-Couto-Lima Moreira, Denise-Ramos-Silveira Alves, Cyntia-Rodrigues-Araújo Estrela, Carlos Estrela, Marcus-Santos Carrião, Andris-Figueiroa Bakuzis, Lawrence-Gonzaga Lopes
BACKGROUND: Silver has a long history of use in medicine as an antimicrobial and anti-inflammatory agent. Silver nanoparticles (NAg) offer the possibility to control the formation oral biofilms through the use of nanoparticles with biocidal, anti-adhesive, and delivery abilities. This study aims to evaluate the antibacterial effect of resin luting cements with and without NAg, and their influence on color, sorption and solubility. MATERIAL AND METHODS: NAg were incorporated to two dual-cured resin cements (RelyX ARC (RA) color A1 and RelyX U200 (RU) color A2) in two concentrations (0...
October 2016: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/27689720/a-versatile-route-to-polymer-reinforced-broadband-antireflective-and-superhydrophobic-thin-films-without-high-temperature-treatment
#8
Tingting Ren, Zhi Geng, Junhui He, Xiaojie Zhang, Jin He
Broadband high transmittance, good mechanical robustness as well as simple and low temperature fabrication are three important aspects that dictate the practical applications of superhydrophobic thin films, especially on organic substrates. However, it has proved difficult to meet these challenges. In the present work, superhydrophobic thin films were prepared by first dip-coating solid silica nanoparticles, then spray-coating hollow silica nanoparticles, followed by spray-coating mesoporous silica nanosheets & poly(vinyl alcohol) (PVA), and eventually chemical vapor deposition of 1H,1H,2H,2H-perflurooctyltriethoxysilane (POTS) at 90°C...
January 15, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/27663233/macrophages-mediated-diagnosis-of-rheumatoid-arthritis-using-fibrin-based-magnetic-nanoparticles-as-mri-contrast-agents
#9
Prabu Periyathambi, Thotapalli Parvathaleswara Sastry, Suresh Kumar Anandasadagopan, Kanagavel Manickavasagam
BACKGROUND: A variety of bioimaging tools assists in the diagnosis and evaluation of rheumatoid arthritis (RA) and other osteoarthritis. However, detection of RA in the early stages by targeting its macrophages with suitable contrast agents will help in arresting the progression of the disease. METHODS: In the present study, we investigated the effectiveness of using magnetic fibrin nanoparticles (MFNPs) conjugated with folic acid (FA-MFNPs) as a specific contrast agent to target the activated macrophages, which overexpress the folate receptors (FR) in the knee joints of rats with antigen-induced arthritis (AIA)...
January 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27643533/long-circulating-au-tio2-nanocomposite-as-a-sonosensitizer-for-ros-mediated-eradication-of-cancer
#10
V G Deepagan, Dong Gil You, Wooram Um, Hyewon Ko, Seunglee Kwon, Ki Young Choi, Gi-Ra Yi, Jun Young Lee, Doo Sung Lee, Kwangmeyung Kim, Ick Chan Kwon, Jae Hyung Park
Although sonodynamic therapy (SDT) has emerged as a potential alternative to conventional photodynamic therapy, the low quantum yield of the sonosensitizer such as TiO2 nanoparticles (NPs) is still a major concern. Here, we have developed hydrophilized Au-TiO2 nanocomposites (HAu-TiO2 NCs) as sonosensitizers for improved SDT. The physicochemical properties of HAu-TiO2 NCs were thoroughly studied and compared with their counterparts without gold deposition. Upon exposure of HAu-TiO2 NCs to ultrasound, a large quantity of reactive oxygen species (ROS) were generated, leading to complete suppression of tumor growth after their systemic administration in vivo...
October 3, 2016: Nano Letters
https://www.readbyqxmd.com/read/27617481/facile-synthesis-of-platelike-hierarchical-li1-2mn0-54ni0-13co0-13o2-with-exposed-010-planes-for-high-rate-and-long-cycling-stable-lithium-ion-batteries
#11
Jiong Zeng, Yanhui Cui, Deyang Qu, Qian Zhang, Junwei Wu, Xiaomeng Zhu, Zuohua Li, Xinhe Zhang
Lithium-rich layered oxides are promising cathode candidates for the production of high-energy and high-power electronic devices with high specific capacity and high discharge voltage. However, unstable cycling performance, especially at high charge-recharge rate, is the most challenge issue which needs to be solved to foster the diffusion of these materials. In this paper, hierarchical platelike Li1.2Mn0.54Ni0.13Co0.13O2 cathode materials were synthesized by a facile solvothermal method followed by calcination...
October 5, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27548677/virus-like-nanoparticle-vaccine-confers-protection-against-toxoplasma-gondii
#12
Dong Hun Lee, Su Hwa Lee, Ah Ra Kim, Fu Shi Quan
The inner membrane complex (IMC) of Toxoplasma gondii as a peripheral membrane system has unique and critical roles in parasite replication, motility and invasion. Disruption of IMC sub-compartment protein produces a severe defect in T. gondii endodyogeny, the form of internal cell budding. In this study, we generated T. gondii virus-like particle particles (VLPs) containing proteins derived from IMC, and investigated their efficacy as a vaccine in mice. VLP vaccination induced Toxoplasma gondii-specific total IgG, IgG1 and IgG2a antibody responses in the sera and IgA antibody responses in the feces...
2016: PloS One
https://www.readbyqxmd.com/read/27536103/safety-profile-of-solid-lipid-nanoparticles-loaded-with-rosmarinic-acid-for-oral-use-in-vitro-and-animal-approaches
#13
Ana Raquel Madureira, Sara Nunes, Débora A Campos, João C Fernandes, Cláudia Marques, Monica Zuzarte, Beatriz Gullón, Luís M Rodríguez-Alcalá, Conceição Calhau, Bruno Sarmento, Ana Maria Gomes, Maria Manuela Pintado, Flávio Reis
Rosmarinic acid (RA) possesses several protective bioactivities that have attracted increasing interest by nutraceutical/pharmaceutical industries. Considering the reduced bioavailability after oral use, effective (and safe) delivery systems are crucial to protect RA from gastrointestinal degradation. This study aims to characterize the safety profile of solid lipid nanoparticles produced with Witepsol and Carnauba waxes and loaded with RA, using in vitro and in vivo approaches, focused on genotoxicity and cytotoxicity assays, redox status markers, hematological and biochemical profile, liver and kidney function, gut bacterial microbiota, and fecal fatty acids composition...
2016: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/27522484/3d-origami-electrochemical-device-for-sensitive-pb-2-testing-based-on-dna-functionalized-iron-porphyrinic-metal-organic-framework
#14
Xiu Wang, Chunlei Yang, Shaojun Zhu, Mei Yan, Shenguang Ge, Jinghua Yu
A highly sensitive electrochemical (EC) biosensor combined with a 3D origami device for detection of Pb(2+)was developed based on novel Au nanoparticles modified paper working electrode (Au-PWE) as sensor platform and DNA functionalized iron-porphyrinic metal-organic framework ((Fe-P)n-MOF-Au-GR) hybrids as signal probes. In the presence of Pb(2+), GR could be specifically cleaved at the ribonucleotide (rA) site, which produced the short (Fe-P)n-MOF-linked oligonucleotide fragment to hybridize with hairpin DNA immobilized on the surface of Au-PWE...
January 15, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/27499622/proretinal-nanoparticles-stability-release-efficacy-and-irritation
#15
Pimolphan Pisetpackdeekul, Piyapan Supmuang, Porntip Pan-In, Wijit Banlunara, Benchaphorn Limcharoen, Chayada Kokpol, Supason Wanichwecharungruang
Despite many potent biological activities, retinoids such as retinoic acid (RA) and retinal possess dose-related broad side effects. In this study, we show that this problem, which has been unsolvable for a long time, can be tackled through a controlled release strategy in which retinal is continuously delivered to the skin via sustained release from proretinal nanoparticles. The water dispersible proretinal nanoparticles are stable when kept in water at neutral pH and at room temperature for 8 months under light-proof conditions, and show sustained release of retinal into human synthetic sebum at a pH of 5...
2016: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/27280251/size-dependent-cellular-uptake-of-trans-activator-of-transcription-functionalized-nanoparticles
#16
Heesuk Kim, Jin-Ha Choi, So-Ra Kang, Byung-Keun Oh, Wonkoo Lee, Oh-Sun Kwon, Kwanwoo Shin
We investigated the cellular uptake efficiencies of differently-sized silica nanoparticles in the presence and the absence of trans-activator of transcription (TAT) peptide. Silica nanoparticles incorporating fluorescent dye molecules with diameters of 30 to 800 nm were synthesized, and the surfaces of the silica nanoparticles were functionalized with TAT peptides or 3-aminopropyltriethoxysilane (APTES). Confocal microscopy and flow cytometry were used to determine the cellular locations and the uptake efficiencies of positively-charged silica nanoparticles (APTES- and TAT-) of various sizes from 30 to 800 nm...
March 2016: Journal of Biomedical Nanotechnology
https://www.readbyqxmd.com/read/27219463/complex-thermodynamic-behavior-of-single-stranded-nucleic-acid-adsorption-to-graphene-surfaces
#17
Srivathsan V Ranganathan, Ken Halvorsen, Chris A Myers, Neil M Robertson, Mehmet V Yigit, Alan A Chen
In just over a decade since its discovery, research on graphene has exploded due to a number of potential applications in electronics, materials, and medicine. In its water-soluble form of graphene oxide, the material has shown promise as a biosensor due to its preferential absorption of single-stranded polynucleotides and fluorescence quenching properties. The rational design of these biosensors, however, requires an improved understanding of the binding thermodynamics and ultimately a predictive model of sequence-specific binding...
June 21, 2016: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/27191896/binding-strength-of-nucleobases-and-nucleosides-on-silver-nanoparticles-probed-by-a-colorimetric-method
#18
Lu Yu, Na Li
Because of their unique and tunable properties, oligonucleotide-functionalized noble metal nanoparticles have provided a versatile platform for various engineering and biomedical applications. The vast majority of such applications were demonstrated with gold nanoparticles (AuNPs) while only a few were demonstrated with sliver nanoparticles (AgNPs). This is largely due to the lack of robust protocols to functionalize AgNPs with thiol-modified oligonucleotides. Previous studies have revealed strong interactions between nucleobases and AgNPs...
June 7, 2016: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/27189528/methylprednisolone-acetate-loaded-hydroxyapatite-nanoparticles-as-a-potential-drug-delivery-system-for-treatment-of-rheumatoid-arthritis-in-vitro-and-in-vivo-evaluations
#19
Samira Jafari, Nasrin Maleki-Dizaji, Jaleh Barar, Mohammad Barzegar-Jalali, Maryam Rameshrad, Khosro Adibkia
The objective of this study was to improve the therapeutic efficacy of methylprednisolone acetate (MPA) in the treatment of rheumatoid arthritis (RA) by incorporating the drug into the hydroxyapatite (HAp) nanoparticles. The nanoparticles were synthesized using a chemical precipitation technique and their size and morphology were evaluated by dynamic light scattering and scanning electron microscopy (SEM). The solid-state behavior of the nanoparticles was also characterized by operating X-ray powder diffraction (XRPD), differential scanning calorimetry (DSC) and Fourier-transform infrared spectroscopy (FTIR)...
August 25, 2016: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/27133037/utilization-of-nanoparticle-technology-in-rheumatoid-arthritis-treatment
#20
REVIEW
Sanam Dolati, Sanam Sadreddini, Davoud Rostamzadeh, Majid Ahmadi, Farhad Jadidi-Niaragh, Mehdi Yousefi
Rheumatoid arthritis (RA) is one of the common and severe autoimmune diseases related to joints. This chronic autoimmune inflammatory disease, leads to functional limitation and reduced quality of life, since as there is bone and cartilage destruction, joint swelling and pain. Current advances and new treatment approaches have considerably postponed disease progression and improved the quality of life for many patients. In spite of major advances in therapeutic options, restrictions on the routes of administration and the necessity for frequent and long-term dosing often result in systemic adverse effects and patient non-compliance...
May 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
keyword
keyword
117495
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"