keyword
MENU ▼
Read by QxMD icon Read
search

Microspheres

keyword
https://www.readbyqxmd.com/read/28109816/preparation-of-magnetic-graphene-oxide-ferrite-nanocomposites-for-oxidative-decomposition-of-remazol-black-b
#1
Shabnam Sheshmani, Behnaz Falahat, Farrokh Roya Nikmaram
A solvothermal synthesis method was used to prepare graphene oxide (GO) supported ferrite (MFe2O4, M=Fe, Co and Ni) nanocomposites. Subsequently, the application of MFe2O4 nanocomposites as adsorbent for Remazol Black B (RBB) removal was investigated. The nanocomposites were characterized by X-ray powder diffraction (XRD), Fourier transform infrared spectra (FT-IR), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and vibrating sample magnetometer. It was shown that dispersed MFe2O4 microspheres with uniform size (20-30nm) were homogeneously deposited on GO nanosheets...
January 18, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28109812/chitosan-as-a-vehicle-for-growth-factor-delivery-various-preparations-and-their-applications-in-bone-tissue-regeneration
#2
REVIEW
Jayachandran Venkatesan, Sukumaran Anil, Se-Kwon Kim, Min Suk Shim
The replacement of conventional autografts and allografts by bone fragments constructed from alternate materials, cells, and molecules (growth factors, drugs, etc.) is an exciting prospect in the field of bone tissue engineering. Bone morphogenetic protein-2 (BMP-2) is a growth factor that has been extensively studied from this point of view. This review analyzes the relevance of chitosan and its derivatives and composites with various materials such as ceramics, heparin, silica, stem cells, titanium implants, etc...
January 18, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28109149/-indirect-coculture-of-human-infrapatellar-fat-pad-derived-stem-cells-with-osteoarthritic-chondrocytes-induces-their-chondrogenesis
#3
Junjun Yang, Cheng Chen, Liu Yang, Xiongbo Song, Wenbin Xie, Shu Huang, Baorong Liu
Objective To promote phenotype recovery of osteoarthritic articular chondrocytes (OACs) and induce chondrogenic differentiation of infrapatellar fat pad-derived stem cells (IPFPSCs) by indirectly coculturing these two types of cells. Methods The OACs and IPFPSCs were isolated and cultured in vitro. This experiment included single IPFPSCs group, single OACs group, and coculture group. After cells were cultured in vitro with chondrogenic medium for 21 days, the chondrocyte phenotypes were determined by HE staining (cell morphology), Alcian blue staining (glycosaminoglycan content) and immunofluorescence cytochemistry (collagen 1, collagen 2, collagen 3, aggrecan, SOX9)...
February 2017: Xi Bao Yu Fen Zi Mian Yi Xue za Zhi, Chinese Journal of Cellular and Molecular Immunology
https://www.readbyqxmd.com/read/28107618/carbon-hollow-microspheres-with-a-designable-mesoporous-shell-for-high-performance-electromagnetic-wave-absorption
#4
Hailong Xu, Xiaowei Yin, Meng Zhu, Meikang Han, Zexin Hou, Xinliang Li, Litong Zhang, Laifei Cheng
In this work, mesoporous carbon hollow microspheres (PCHMs) with designable mesoporous shell and interior void are constructed by a facile in situ stöber templating approach and a pyrolysis-etching process. The PCHMs are characterized by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectra, Raman, nitrogen adsorption and desorption system. A uniform mesoporous shell (pore size 4.7 nm) with a thickness of 55 nm and a cavity size of 345 nm is realized. The composite of paraffin mixed with 20 wt...
January 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28107472/fractionation-of-magnetic-microspheres-in-a-microfluidic-spiral-interplay-between-magnetic-and-hydrodynamic-forces
#5
S Dutz, M E Hayden, U O Häfeli
Magnetic forces and curvature-induced hydrodynamic drag have both been studied and employed in continuous microfluidic particle separation and enrichment schemes. Here we combine the two. We investigate consequences of applying an outwardly directed magnetic force to a dilute suspension of magnetic microspheres circulating in a spiral microfluidic channel. This force is realized with an array of permanent magnets arranged to produce a magnetic field with octupolar symmetry about the spiral axis. At low flow rates particles cluster around an apparent streamline of the flow near the outer wall of the turn...
2017: PloS One
https://www.readbyqxmd.com/read/28106562/plasma-amyloid-%C3%AE-peptides-in-type-2-diabetes-a-matched-case-control-study
#6
Kirsten E Peters, Wendy A Davis, Kevin Taddei, Ralph N Martins, Colin L Masters, Timothy M E Davis, David G Bruce
BACKGROUND: Plasma amyloid-β (Aβ) levels have rarely been investigated in type 2 diabetes despite its known associations with Alzheimer's disease. OBJECTIVE: To compare blood plasma Aβ concentrations (Aβ40 and Aβ42) in cognitively normal individuals with and without type 2 diabetes. METHODS: Plasma Aβ40 and Aβ42 were measured in 194 participants with diabetes recruited from the community-based Fremantle Diabetes Study Phase II cohort (mean age 71 years, 59% males) and 194 age-, sex-, and APOEɛ4 allele-matched, control subjects without diabetes from the Australian Imaging, Biomarkers and Lifestyle Study using a multiplex microsphere-based immunoassay...
January 19, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28106341/photocontrolled-extraction-of-uric-acid-from-biological-samples-based-on-photoresponsive-surface-molecularly-imprinted-polymer-microspheres
#7
Cheng-Bin Gong, Zai-Yong Li, Lan-Tao Liu, Yu-Bu Wei, Xia Yang, Cheuk-Fai Chow, Qian Tang
We aim to develop novel photoresponsive surface molecularly imprinted polymer microspheres, a SiO2 -surface molecularly imprinted polymer, for the photocontrolled extraction of uric acid from biological samples. The SiO2 -surface molecularly imprinted polymer was prepared on silica microspheres by surface polymerization and characterized by using scanning electron microscopy, transmission electron microscopy, FTIR spectroscopy, thermogravimetric analysis, nitrogen adsorption-desorption analysis, and UV-visible spectroscopy...
January 20, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28106003/large-scale-self-assembly-of-uniform-submicron-silver-sulfide-material-driven-by-precise-pressure-control
#8
Juanjuan Qi, Ke Chen, Shuhao Zhang, Yun Yang, Lin Guo, Shihe Yang
The controllable self-assembly of nanosized building blocks into larger specific structures can provide an efficient method of synthesizing novel materials with excellent properties. The self-assembly of nanocrystals (NCs) by assisted means is becoming an extremely active area of research, because it provides a method of producing large-scale advanced functional materials with potential applications in the areas of energy, electronics, optics, and biologics. In this study, we applied an efficient strategy, namely, the use of ���pressure control��� to the assembly of silver sulfide (Ag2S) nanospheres (NSs) with a diameter of approximately 33 nm into large-scale, uniform Ag2S sub-microspheres (SMs) with a size of about 0...
January 20, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28105711/a-gate-evaluation-of-the-sources-of-error-in-quantitative-90-y-pet
#9
Jared Strydhorst, Thomas Carlier, Arnaud Dieudonné, Maurizio Conti, Irène Buvat
PURPOSE: Accurate reconstruction of the dose delivered by (90) Y microspheres using a postembolization PET scan would permit the establishment of more accurate dose-response relationships for treatment of hepatocellular carcinoma with (90) Y. However, the quality of the PET data obtained is compromised by several factors, including poor count statistics and a very high random fraction. This work uses Monte Carlo simulations to investigate what impact factors other than low count statistics have on the quantification of(90) Y PET...
October 2016: Medical Physics
https://www.readbyqxmd.com/read/28105342/five-percent-dextrose-maximizes-dose-delivery-of-yttrium-90-resin-microspheres-and-reduces-rates-of-premature-stasis-compared-to-sterile-water
#10
Mary Ellen Koran, Samantha Stewart, Jennifer C Baker, Andrew J Lipnik, Fil Banovac, Reed A Omary, Daniel B Brown
Resin Yttrium-90 (Y90) microspheres have historically been infused using sterile water (H2O). In 2013, recommendations expanded to allow delivery with 5% dextrose in water (D5W). In this retrospective study, we hypothesized that D5W would improve Y90 delivery with a lower incidence of stasis. We reviewed 190 resin Y90 infusions using H2O (n=137) or D5W (n=53). Y90 dosimetry was calculated using the body surface area method. Infusion was halted if intra-arterial stasis was fluoroscopically identified prior to clearing the vial...
December 2016: Biomedical Reports
https://www.readbyqxmd.com/read/28103586/selective-area-growth-of-periodic-nanopyramid-light-emitting-diode-arrays-on-gan-sapphire-templates-patterned-by-multiple-exposure-colloidal-lithography
#11
Zhuo Xiong, Tongbo Wei, Yonghui Zhang, Xiang Zhang, Chao Yang, Zhiqiang Liu, Guodong Yuan, Jinmin Li, Junxi Wang
Gallium nitride-based nanopyramid light-emitting diodes are a promising technology to achieve highly efficient solid-state lighting and beyond. Here, periodic nanopyramid light-emitting diode arrays on gallium nitride/sapphire templates were fabricated by selective-area metalorganic chemical vapor deposition and multiple-exposure colloidal lithography. The electric field intensity distribution of incident light going through polystyrene microspheres and photoresist are simulated using finite-different time-domain method...
January 19, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28102559/effect-of-bone-like-hydroxyapatite-poly-amino-acid-loaded-with-rifapentine-microspheres-on-bone-and-joint-tuberculosis-in-vitro
#12
Yuwu Liu, Dianming Jiang
Rifapentine-loaded poly(lactic-co-glycolic acid) microspheres (RPMs)-loaded bone-like hydroxyapatite/poly amino acid (BHA/PAA) is effective in curing S. aureus-induced chronic osteomyelitis. This study continues to investigate the effect of RPM-loaded BHA/PAA on the bacterial growth of Mycobacterium tuberculosis (MTB), cell proliferation and differentiation in MTB H37Rv-infected MG63 cells. Furthermore, whether Wnt/β-catenin signaling pathway was activated by RPM-loaded BHA/PAA was explored. We found the bactec growth index of H37Rv was significantly inhibited by RPM-loaded BHA/PAA...
January 19, 2017: Cell Biology International
https://www.readbyqxmd.com/read/28102399/microsphere-cytometry-to-interrogate-microenvironment-dependent-cell-signaling
#13
Henriette Christie Ertsås, Garry P Nolan, Mark A LaBarge, James B Lorens
Microenvironmental cues comprising surface-mediated and soluble factors control cellular signaling mechanisms underlying normal cellular responses that define homeostatic and diseased cell states. In order to measure cell signaling in single adherent cells, we developed a novel microsphere-based flow cytometry approach. Single normal or neoplastic cells were adhered to uniform microspheres that display mimetic-microenvironments comprising surface combinations of extracellular matrix (ECM) in the presence of soluble agonists/antagonists...
January 19, 2017: Integrative Biology: Quantitative Biosciences From Nano to Macro
https://www.readbyqxmd.com/read/28101850/assessment-of-regional-pulmonary-blood-flow-using-68-ga-dota-pet
#14
Carlos Velasco, Jesus Mateo, Arnoldo Santos, Adriana Mota-Cobian, Fernando Herranz, Juan Pellico, Ruben A Mota, Samuel España, Jesus Ruiz-Cabello
BACKGROUND: In vivo determination of regional pulmonary blood flow (PBF) is a valuable tool for the evaluation of many lung diseases. In this study, the use of (68)Ga-DOTA PET for the in vivo quantitative determination of regional PBF is proposed. This methodology was implemented and tested in healthy pigs and validated using fluorescent microspheres. The study was performed on young large white pigs (n = 4). To assess the reproducibility and consistency of the method, three PET scans were obtained for each animal...
December 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28101766/crossing-the-blood-brain-barrier-recent-advances-in-drug-delivery-to-the-brain
#15
Mayur M Patel, Bhoomika M Patel
CNS disorders are on the rise despite advancements in our understanding of their pathophysiological mechanisms. A major hurdle to the treatment of these disorders is the blood-brain barrier (BBB), which serves as an arduous janitor to protect the brain. Many drugs are being discovered for CNS disorders, which, however fail to enter the market because of their inability to cross the BBB. This is a pronounced challenge for the pharmaceutical fraternity. Hence, in addition to the discovery of novel entities and drug candidates, scientists are also developing new formulations of existing drugs for brain targeting...
January 18, 2017: CNS Drugs
https://www.readbyqxmd.com/read/28101615/erratum-to-chemoembolization-of-neuroendocrine-liver-metastases-using-streptozocin-and-tris-acryl-microspheres-embozar-embosphere%C3%A2-%C3%A2-zanosar-study
#16
Jean-Pierre Pelage, Audrey Fohlen, Emmanuel Mitry, Christine Lagrange, Alain Beauchet, Philippe Rougier
No abstract text is available yet for this article.
January 18, 2017: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/28099950/nano-particles-assembled-porous-core-shell-znmn2o4-microspheres-with-superb-performance-for-lithium-batteries
#17
Tong Zhang, Huijuan Yue, Hailong Qiu, Wei Yingjin, Chunzhong Wang, Gang Chen, Zhang Dong
Porous ZnMn2O4 microspheres were prepared via a facile co-precipitation method followed by calcination at various temperatures and evaluated as anode materials for Lithium ion batteries. The sample prepared at 600��C outperformed the other samples in terms of electrochemical performance with high reversible capacity, high-rate capability, and excellent cycling performance. The capacity of the sample remained as high as 999 mAh g-1 at a current rate of 100 mA g-1 after 50 cycles ��� one of the best ever reported for ZnMn2O4-based materials...
January 18, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28098302/carbon-two-dimensional-mote2-core-shell-structured-microspheres-as-an-anode-material-for-na-ion-batteries
#18
Jung Sang Cho, Hyeon Seok Ju, Jung-Kul Lee, Yun Chan Kang
Unique-structured composite microspheres of carbon and MoTe2 were prepared by a two-step process. Precursor C-MoOx composite microspheres were prepared by spray pyrolysis, and then the precursor was transformed into C-MoTe2 composite microspheres by a tellurization process. C-MoTe2 composites with a uniform distribution of MoTe2 nanocrystals (C/MoTe2) and core-shell-structured C-MoTe2 composites (C@MoTe2) were synthesized at tellurization temperatures of 450 and 600 °C, respectively. At a higher tellurization temperature of 600 °C, all of the MoTe2 nanocrystals moved to the surface of the microsphere because of the Ostwald ripening process...
January 18, 2017: Nanoscale
https://www.readbyqxmd.com/read/28097929/improved-survival-of-anchorage-dependent-cells-in-core-shell-hydrogel-microcapsules-via-co-encapsulation-with-cell-friendly-microspheres
#19
In-Yong Kim, Hyungsoo Choi, Kyekyoon Kevin Kim
In this study, we investigated the effect of intracapsular environment on the survival of anchorage-dependent cells (ADCs) encapsulated in alginate microcapsules with three different core structures, i.e., liquid, semi-liquid and microsphere-encapsulating semi-liquid core, using NIH 3T3 fibroblasts as an ADC model. For the latter, we fabricated poly (ε-caprolactone) microspheres and co-encapsulated them with the cells, to establish cell-substrate interactions in the capsule. The fibroblast cells co-encapsulated with the microspheres exhibited higher survival and growth than those without...
January 18, 2017: Journal of Microencapsulation
https://www.readbyqxmd.com/read/28097772/laser-irradiation-induced-melting-and-reduction-reaction-for-the-formation-of-pt-based-bimetallic-alloy-particles-in-liquids
#20
Changhao Liang, Shouliang Wu, Enmei Dai, Yixing Ye, Jun Liu, Zhenfei Tian, Yunyu Cai, Xiaoguang Zhu, Yechuang Han
Laser melting in liquids (LML) is one of the most effective methods to prepare bimetallic alloys, the formation process of which is always research focus but still ambiguous. In this paper, we prepared two types of Pt-based bimetallic alloys by LML, including Pt-Au alloys and Pt-iron group metal (iM = Fe/Co/Ni) alloys, and investigated the corresponding mechanisms of alloying process. Detailed component and structural characterizations indicate that laser irradiation induced a quite rapid formation process (not exceed 10 s) of Pt-Au alloy nanospheres, and the crystalline structures of Pt-Au alloys is determined by the monometallic constituents with higher content...
January 18, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
keyword
keyword
116334
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"