A membrane model of the Reissner-Nordstrom singularity with repulsive gravity

2008 ◽  
Author(s):  
V. A. Belinski ◽  
M. Pizzi ◽  
A. Paolino ◽  
Da-Shin Lee ◽  
Wolung Lee ◽  
...  
Keyword(s):  
Membrane Model ◽  
Repulsive Gravity

Influence of Rim Run-Out on the Nonuniformity of Tire-Wheel Assemblies

1994 ◽  
Vol 22 (2) ◽  
pp. 99-120 ◽  
Author(s):  
T. B. Rhyne ◽  
R. Gall ◽  
L. Y. Chang
Keyword(s):  
Finite Element ◽  
Radial Force ◽  
Membrane Model ◽  
Model Experiments ◽  
Force Variation ◽  
One To One ◽  
The One

Abstract An analytical membrane model is used to study how wheel imperfections are converted into radial force variation of the tire-wheel assembly. This model indicates that the radial run-out of the rim generates run-out of the tire-wheel assembly at slightly less than the one to one ratio that was expected. Lateral run-out of the rim is found to generate radial run-out of the tire-wheel assembly at a ratio that is dependent on the tire design and the wheel width. Finite element studies of a production tire validate and quantify the results of the membrane model. Experiments using a specially constructed precision wheel demonstrate the behavior predicted by the models. Finally, a population of production tires and wheels show that the lateral run-out of the rims contribute a significant portion to the assembly radial force variation. These findings might be used to improve match-mounting results by taking lateral rim run-out into account.

Folic acid and zinc inhibit angiogenesis in chicken chorioallontoic membrane model via angiogenic factor genes

2018 ◽  
Vol 60 (3) ◽  
pp. 67 ◽  
Author(s):  
Şefik Güran ◽  
Zehra Dilşad Çoban ◽  
Orhan Fermanlı ◽  
Emre Aydıngöz ◽  
Emre İpek
Keyword(s):  
Folic Acid ◽  
Membrane Model ◽  
Angiogenic Factor

scholarly journals Kinetic Membrane Model of Outer Hair Cells

2021 ◽  
Vol 120 (1) ◽  
pp. 122-132
Author(s):  
Kuni H. Iwasa
Keyword(s):  
Hair Cells ◽  
Outer Hair Cells ◽  
Membrane Model

Biophysical characterization of polymyxin b interaction with LPS aggregates and membrane model systems

Biopolymers ◽  
2012 ◽  
Vol 98 (4) ◽  
pp. 338-344 ◽  
Author(s):  
Marco M. Domingues ◽  
Rita G. Inácio ◽  
José M. Raimundo ◽  
Miguel Martins ◽  
Miguel A. R. B. Castanho ◽  
...  
Keyword(s):  
Polymyxin B ◽  
Model Systems ◽  
Membrane Model ◽  
Biophysical Characterization

scholarly journals Antiangiogenic potential of Jatropha curcas latex in the chick chorioallantoic membrane model

2019 ◽  
Vol 29 (1) ◽  
pp. 32157
Author(s):  
Luciane Madureira Almeida ◽  
Elisa Flávia Luiz Cardoso Bailão ◽  
Illana Reis Pereira ◽  
Fabrício Alves Ferreira ◽  
Patrícia Lima D'Abadia ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Jatropha Curcas ◽  
Physicochemical Characterization ◽  
Chorioallantoic Membrane ◽  
Angiogenesis Inhibitor ◽  
Negative Control ◽  
New Drugs ◽  
Membrane Model ◽  
Chick Chorioallantoic Membrane

AIMS: To perform a physicochemical and phytochemical characterization of Jatropha curcas latex and to investigate its antiangiogenic potential. METHODS: We performed an initial physicochemical characterization of J. curcas latex using thermal gravimetric analyses and Fourier Transform Infrared spectroscopy. After that, phenols, tannins and flavonoids were quantified. Finally, the potential of J. curcas latex to inhibit angiogenesis was evaluated using the chick chorioallantoic membrane model. Five groups of 20 fertilized chicken eggs each had the chorioallantoic membrane exposed to the following solutions: (1) water, negative control; (2) dexamethasone, angiogenesis inhibitor; (3) Regederm®, positive control; (4) 25% J. curcas latex diluted in water; (5) 50% J. curcas latex diluted in water; and (6) J. curcas crude latex. Analysis of the newly-formed vascular net was made through captured images and quantification of the number of pixels. Histological analyses were performed to evaluate the inflammation, neovascularization, and hyperemia parameters. The results were statically analyzed with a significance level set at p ˂0.05.RESULTS: Physicochemical characterization showed that J. curcas latex presented a low amount of cis-1.4-polyisoprene, which reduced its elasticity and thermal stability. Phytochemical analyses of J. curcas latex identified a substantial amount of phenols, tannins, and flavonoids (51.9%, 11.8%, and 0.07% respectively). Using a chick chorioallantoic membrane assay, we demonstrated the antiangiogenic potential of J. curcas latex. The latex induced a decrease in the vascularization of the membranes when compared with neutral and positive controls (water and Regederm®). However, when compared with the negative control (dexamethasone), higher J. curcas latex concentrations showed no significant differences.CONCLUSIONS: J. curcas latex showed low thermal stability, and consisted of phenols, tannins, and flavonoids, but little or no rubber. Moreover, this latex demonstrated a significant antiangiogenic activity on a chick chorioallantoic membrane model. The combination of antimutagenic, cytotoxic, antioxidant and antiangiogenic properties makes J. curcas latex a potential target for the development of new drugs.

Deposition of Biocolloids on a Charged Collector Surface:  An Ion-Penetrable Membrane Model

Langmuir ◽  
2001 ◽  
Vol 17 (11) ◽  
pp. 3466-3471 ◽  
Author(s):  
Yung-Chih Kuo ◽  
Jyh-Ping Hsu ◽  
De-Fang Chen
Keyword(s):  
Membrane Model
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