keyword
MENU ▼
Read by QxMD icon Read
search

NP

keyword
https://www.readbyqxmd.com/read/29334396/towards-the-continuous-production-of-pt-based-heterogeneous-catalysts-using-microfluidic-systems
#1
Uson Laura, Manuel Arruebo, Victor Sebastian
The continuous production of Pt-based heterogeneous catalysts based on ultra-small (<2 nm) noble metal nanoparticles deposited on mesoporous ordered silica and their catalytic activity in VOC abatement are here reported. Microfluidic reactors can be used not only to enable the fast and controlled production of ultra-small Pt nanoparticles (NPs), but also alloyed NPs including PtPd, PtRu and PtRh can be formed in short residence times (between 60 s and 5 min). A novel continuous and homogeneous loading of these catalytic NPs on SBA-15 used as a mesoporous support is also here reported...
January 15, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29334310/dendritic-polyglycerol-nanoparticles-show-charge-dependent-bio-distribution-in-early-human-placental-explants-and-reduce-hcg-secretion
#2
Herbert Juch, Liudmila Nikitina, Sabine Reimann, Martin Gauster, Gottfried Dohr, Barbara Obermayer-Pietsch, Denise Hoch, Karin Kornmueller, Rainer Haag
A thorough understanding of nanoparticle bio-distribution at the feto-maternal interface will be a prerequisite for their diagnostic or therapeutic application in women of childbearing age and for teratologic risk assessment. Therefore, the tissue interaction of biocompatible dendritic polyglycerol nanoparticles (dPG-NPs) with first- trimester human placental explants were analyzed and compared to less sophisticated trophoblast-cell based models. First-trimester human placental explants, BeWo cells and primary trophoblast cells from human term placenta were exposed to fluorescence labeled, ∼5 nm dPG-NPs, with differently charged surfaces, at concentrations of 1 µM and 10 nM, for 6 and 24 h...
January 15, 2018: Nanotoxicology
https://www.readbyqxmd.com/read/29334099/composition-dependent-emission-linewidth-broadening-in-lead-bromide-perovskite-apbbr3-a-cs-and-ch3nh3-nanoparticles
#3
Sujin Ham, Heejae Chung, Tae-Woo Kim, Jiwon Kim, Dongho Kim
Lead halide perovskite nanoparticles (NPs) are attractive as they exhibit excellent color purity and have a tunable band gap, and can thus be applied in highly efficient photovoltaic and light-emitting diodes. Fundamental studies of emission linewidth broadening due to spectral shifts in perovskite NPs may suggest a way to improve their color purity. However, the carrier-induced Stark shift that causes spectral diffusion still requires investigation. In this study, we explore composition-related emission linewidth broadening by comparing CsPbBr3 and CH3NH3PbBr3 (MAPbBr3) perovskite NPs...
January 15, 2018: Nanoscale
https://www.readbyqxmd.com/read/29333099/pulsed-radiofrequency-applied-to-the-sciatic-nerve-improves-neuropathic-pain-by-down-regulating-the-expression-of-calcitonin-gene-related-peptide-in-the-dorsal-root-ganglion
#4
Hao Ren, Hailong Jin, Zipu Jia, Nan Ji, Fang Luo
Background: Clinical studies have shown that applying pulsed radiofrequency (PRF) to the neural stem could relieve neuropathic pain (NP), albeit through an unclear analgesic mechanism. And animal experiments have indicated that calcitonin gene-related peptide (CGRP) expressed in the dorsal root ganglion (DRG) is involved in generating and maintaining NP. In this case, it is uncertain whether PRF plays an analgesic role by affecting CGRP expression in DRG. Methods: Rats were randomly divided into four groups: Groups A, B, C, and D...
2018: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/29333037/curcumin-and-natural-derivatives-inhibit-ebola-viral-proteins-an-in-silico-approach
#5
Shruti Baikerikar
Background: Ebola viral disease is a severe and mostly fatal disease in humans caused by Ebola virus. This virus belongs to family Filoviridae and is a single-stranded negative-sense virus. There is no single treatment for this disease which puts forth the need to identify new therapy to control and treat this fatal condition. Curcumin, one of the bioactives of turmeric, has proven antiviral property. Objective: The current study evaluates the inhibitory activity of curcumin, bisdemethoxycurcumin, demethoxycurcumin, and tetrahydrocurcumin against Zaire Ebola viral proteins (VPs)...
December 2017: Pharmacognosy Research
https://www.readbyqxmd.com/read/29332759/neck-pain-in-iranian-school-teachers-prevalence-and-risk-factors
#6
Fatemeh Ehsani, Mohammad Ali Mohseni-Bandpei, César Fernández-De-Las-Peñas, Khodabakhsh Javanshir
Neck pain (NP) is a common occupational health problem associated with a number of professions. Many studies indicate that NP is common among teachers, yet no published study was found to address the prevalence and risk factors of NP in Iranian school teachers. The purpose of the current study was to assess the prevalence and risk factors for NP among school teachers in Iran. A cross-sectional study was conducted on 586 randomly selected primary and high schools teachers from 22 schools in Tehran, Iran. Point, last month, last 6 months, annual, and lifetime prevalence rates of NP were 24%, 29%, 33%, 37%, and 43%, respectively...
January 2018: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/29332752/the-effects-of-neck-mobilization-in-patients-with-chronic-neck-pain-a-randomized-controlled-trial
#7
Muhammad Nazim Farooq, Mohammad A Mohseni-Bandpei, Syed Amir Gilani, Muhammad Ashfaq, Qamar Mahmood
OBJECTIVE: To determine the effect of mobilization and routine physiotherapy on pain, disability, neck range of motion (ROM) and neck muscle endurance (NME) in patients having chronic mechanical neck pain (NP). METHODS: Sixty eight patients with chronic mechanical NP were randomly allocated into two groups by using a computer generated random sequence table with 34 patients in the multi-modal mobilization group and 34 patients in the routine physiotherapy group...
January 2018: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/29332393/impact-of-nonideal-nanoparticles-on-xps-quantitation-an-investigation-using-simulation-and-modelling-of-gold-nanoparticles
#8
Smruti R Sahoo, Ramacharyulu Vrk P, Shyue-Chu Ke
Quantitative X-ray photoelectron spectroscopic (XPS) analysis combined with spectral modeling of photoelectrons can be valuable while investigating the surface chemistry of nanoparticles (NPs) with different morphologies. Herein, with the use of NIST Simulation of Electron Spectra for Surface Analysis (SESSA), a comparative analysis of experimental and simulated photoelectron peak intensities in gold nanoparticles (AuNPs) of different morphologies is presented. Three sets of supported AuNPs with different morphologies were selected from a series of as synthesized Au-TiO2 catalyst samples...
January 15, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29332385/a-highly-sensitive-ratiometric-self-assembled-micellar-nanoprobe-for-nitroxyl-and-its-application-in-vivo
#9
Feiyi Wang, Shaohua Yuan, Guichun Yang, CuiFen Lu, Junqi Nie, Zuxing Chen, Jun Ren, Yuan Qiu, Qi Sun, Chunchang Zhao, Wei-Hong Zhu
Nitroxyl (HNO) is a derivative of nitric oxide (NO) which plays an essential role in various biological and pharmacological events. Until now, the in situ trapping and specific detection of HNO in living samples is still challenging. In this project, we fabricated a novel BODIPY-based micellar nanoprobe for monitoring nitroxyl in vitro and in vivo in ratiometric mode in aqueous solution. The probe (P-BODIPY-N) contains an asymmetrical BODIPY dye for fluorescent signaling, and a diphenylphosphinobenzoyl as the trigger moiety, then we encapsulated P-BODIPY-N into the hydrophobic interior of an amphiphilic copolymer (mPEG-DSPE) and prepared a novel BODIPY-based micellar nanoprobe: NP-BODIPY-N...
January 15, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29332272/comparative-study-of-selenium-and-selenium-nanoparticles-with-reference-to-acute-toxicity-biochemical-attributes-and-histopathological-response-in-fish
#10
Neeraj Kumar, Kishore Kumar Krishnani, Narendra Pratap Singh
Recent studies have demonstrated that selenium (Se) and selenium nanoparticles (Se-NPs) exhibited toxicity at a higher concentration. The lethal concentration of Se and Se-NPs was estimated as 5.29 and 3.97 mg/L at 96 h in Pangasius hypophthalmus. However, the effect of different definite concentration of Se (4.5, 5.0, 5.5, and 6.0 mg/L) and Se-NPs (2.5, 3.0, 3.5, and 4.0 mg/L) was decided for acute experiment. Selenium and Se-NPs alter the biochemical attributes such as anti-oxidative status [catalase (CAT), superoxide dismutase (SOD), and glutathione-S-transferase (GST) activities], neurotransmitter enzyme, cellular metabolic enzymes, stress marker, and histopathology of P...
January 13, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29331734/in-vitro-assessment-of-silver-nanoparticles-immunotoxicity
#11
Valentina Galbiati, Laura Cornaghi, Elisabetta Gianazza, Marco A Potenza, Elena Donetti, Marina Marinovich, Emanuela Corsini
This study aimed to characterize unwanted immune effects of nanoparticles (NP) using THP-1 cells, human whole blood and enriched peripheral blood monocytes. Commercially available silver NP (AgNP < 100 nm, also confirmed by Single Particle Extinction and Scattering) were used as prototypical NP. Cells were treated with AgNP alone or in combination with classical immune stimuli (i.e. LPS, PHA, PWM) and cytokine assessed; in addition, CD54 and CD86 expression was evaluated in THP-1 cells. AgNP alone induced dose-related IL-8 production in all models, with higher response observed in THP-1 cells, possibly connected to different protein corona formation in bovine versus human serum...
January 10, 2018: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29331470/the-effect-of-different-precooling-rates-and-cold-storage-on-milk-microbiological-quality-and-composition
#12
Lizandra F Paludetti, Alan L Kelly, Bernadette O'Brien, Kieran Jordan, David Gleeson
The objective of this study was to measure the effect of different milk cooling rates, before entering the bulk tank, on the microbiological load and composition of the milk, as well as on energy usage. Three milk precooling treatments were applied before milk entered 3 identical bulk milk tanks: no plate cooler (NP), single-stage plate cooler (SP), and double-stage plate cooler (DP). These precooling treatments cooled the milk to 32.0 ± 1.4°C, 17.0 ± 2.8°C, and 6.0 ± 1.1°C, respectively. Milk was added to the bulk tank twice daily for 72 h, and the tank refrigeration temperature was set at 3°C...
January 10, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29331387/tumor-associated-macrophages-and-angiogenesis-dual-recognizable-nanoparticles-for-enhanced-cancer-chemotherapy
#13
Duo Cao, Lin Liang, Yixin Xu, Ji Sun, Meng Lei, Man Wang, Yahui Wei, Zhenliang Sun
Tumor-associated macrophages (TAMs) and angiogenesis are increasingly considered as the pivotal factors that affect tumor progress. Herein, we developed the paclitaxel (PTX)-loaded nanoparticles (NP/PTX) and decorated it with an innovative peptide YI (YINP/PTX) for simultaneously targeting delivery of drug to TAMs and angiogenesis. We demonstrated that the modification of YI peptide significantly enhanced the internalization of nanoparticles by cells, accumulation of nanoparticles in tumor tissues, but down regulated the distribution of them in normal tissues especially the liver...
January 10, 2018: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/29330455/towards-electrotuneable-nanoplasmonic-fabry-perot-interferometer
#14
Hayley Weir, Joshua B Edel, Alexei A Kornyshev, Debabrata Sikdar
Directed voltage-controlled assembly and disassembly of plasmonic nanoparticles (NPs) at electrified solid-electrolyte interfaces (SEI) offer novel opportunities for the creation of tuneable optical devices. We apply this concept to propose a fast electrotuneable, NP-based Fabry-Perot (FP) interferometer, comprising two parallel transparent electrodes in aqueous electrolyte, which form the polarizable SEI for directed assembly-disassembly of negatively charged NPs. An FP cavity between two reflective NP-monolayers assembled at such interfaces can be formed or deconstructed under positive or negative polarization of the electrodes, respectively...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29330415/unusual-multiscale-mechanics-of-biomimetic-nanoparticle-hydrogels
#15
Yunlong Zhou, Pablo F Damasceno, Bagganahalli S Somashekar, Michael Engel, Falin Tian, Jian Zhu, Rui Huang, Kyle Johnson, Carl McIntyre, Kai Sun, Ming Yang, Peter F Green, Ayyalusamy Ramamoorthy, Sharon C Glotzer, Nicholas A Kotov
Viscoelastic properties are central for gels and other materials. Simultaneously, high storage and loss moduli are difficult to attain due to their contrarian requirements to chemical structure. Biomimetic inorganic nanoparticles offer a promising toolbox for multiscale engineering of gel mechanics, but a conceptual framework for their molecular, nanoscale, mesoscale, and microscale engineering as viscoelastic materials is absent. Here we show nanoparticle gels with simultaneously high storage and loss moduli from CdTe nanoparticles...
January 12, 2018: Nature Communications
https://www.readbyqxmd.com/read/29330044/effects-of-acupuncture-on-the-heart-rate-variability-cortisol-levels-and-behavioural-response-induced-by-thunder-sound-in-beagles
#16
Carolina Elisabetta Martins Maccariello, Carla Caroline Franzini de Souza, Laura Morena, Daniel Penteado Martins Dias, Magda Alves de Medeiros
Sound stimuli such as fireworks, firearms, and claps of thunder have been used as a stress reactivity model for dogs. Acupuncture has been widely used to treat and prevent physiological and behavioural disorders induced by stress. Our study aims to evaluate the effects of acupuncture on cardiac autonomic modulation (heart rate variability - HRV), behavioural (reactivity) and endocrine (cortisol levels) responses in dogs exposed to sounds of thunder. Twenty-four laboratory beagles (12 males and 12 females, 1-6years old) with no history of phobia to thunder were subjected to a sound stimulus that consisted of a standardized recording of thunder over a 150s period with a maximum intensity of 103-104dB...
January 9, 2018: Physiology & Behavior
https://www.readbyqxmd.com/read/29329586/il-33-st2-signaling-contributes-to-radicular-pain-by-modulating-mapk-and-nf-%C3%AE%C2%BAb-activation-and-inflammatory-mediator-expression-in-the-spinal-cord-in-rat-models-of-noncompressive-lumber-disk-herniation
#17
Si-Jian Huang, Jian-Qin Yan, Hui Luo, Lu-Yao Zhou, Jian-Gang Luo
BACKGROUND: Immune and inflammatory responses occurring in the spinal cord play a pivotal role in the progression of radicular pain caused by intervertebral disk herniation. Interleukin-33 (IL-33) orchestrates inflammatory responses in a wide range of inflammatory and autoimmune disorders of the nervous system. Thus, the purpose of this study is to investigate the expression of IL-33 and its receptor ST2 in the dorsal spinal cord and to elucidate whether the inhibition of spinal IL-33 expression significantly attenuates pain-related behaviors in rat models of noncompressive lumbar disc herniation...
January 12, 2018: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29329270/toxicity-evaluation-of-individual-and-mixtures-of-nanoparticles-based-on-algal-chlorophyll-content-and-cell-count
#18
Kyung-Seok Ko, Dong-Chan Koh, In Chul Kong
The toxic effects of individual and binary mixtures of five metal oxide nanoparticles (NPs) were evaluated based on changes in two endpoints of algal growth: the cell count and chlorophyll content. Various effects were observed according to the concentration tested and type of NPs, and there were no significant differences in findings for the two endpoints. In general, ZnO NPs caused the greatest inhibition of algal growth, and Fe₂O₃ NPs the least. The EC50 for ZnO was 2.0 mg/L for the cell count and 2...
January 12, 2018: Materials
https://www.readbyqxmd.com/read/29328481/ttf1%C3%A2-np-induces-protective-autophagy-during-apoptosis-by-inhibiting-the-akt-mtor-pathway-and-activating-jnk-in-human-liver-cancer-cells
#19
Xuan Zhang, Meilan Zhang, Bin Xiao, Wenjun Jiao, Silin Zhang, Xuewu Zhang
TTF1‑NP is a flavonoid nanoparticle based on 5,2',4'‑trihydroxy‑6,7,5'‑trimethoxyflavone (TTF1), which is derived from the medicinal plant Sorbaria sorbifolia that grows in the Changbai Mountain. We previously demonstrated antitumor effects of TTF1‑NP in human hepatoma including induction of apoptosis and inhibition of angiogenesis, migration and invasion. Herein, we examined the effects of TTF1‑NP on autophagy and its relationship with apoptosis, and explored potential underlying mechanisms in human hepatoma cell lines...
January 5, 2018: Oncology Reports
https://www.readbyqxmd.com/read/29328340/interactions-between-brush-grafted-nanoparticles-within-chemically-identical-homopolymers-the-effect-of-brush-polydispersity
#20
So Jung Park, Seyong Kim, Daeseong Yong, Youngson Choe, Joona Bang, Jaeup U Kim
We systematically examined the polymer-mediated interparticle interactions between polymer-grafted nanoparticles (NPs) within chemically identical homopolymer matrices through experimental and computational efforts. In experiments, we prepared thermally stable gold NPs grafted with polystyrene (PS) or poly(methyl methacrylate) (PMMA), and they were mixed with corresponding homopolymers. The nanocomposites are well dispersed when the molecular weight ratio of free to grafted polymers, α, is small. For α above 10, NPs are partially aggregated or clumped within the polymer matrix...
January 12, 2018: Soft Matter
keyword
keyword
13807
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"