نتایج جستجو برای: cos model

تعداد نتایج: 2110930  

2007
Peter Frazier Indraneel Mukherjee

In this first lecture, we begin by introducing the Chinese Restaurant Process. After a brief review of finite mixture models, we describe the Chinese Restaurant Process mixture, where the latent variables are distributed according to a Chinese Restaurant Process. We end by noting a connection between Dirchlet processes and the Chinese Restaurant Process mixture. We will define a distribution on...

Journal: :Applied Materials Today 2022

In this study, we designed dual network hydrogels with antioxidant and antibacterial activities using marine poly- oligosaccharides skin wound healing potential. The synergy between enzymatic co-crosslinking based on glucose oxidize (GOx)/horseradish peroxidase (HRP) electrostatic interaction positively charged chitooligosaccharides (COS) phenolated chitosan negatively alginate formed a hydroge...

2008
F. Fang C. W. Oosterlee

Here we develop an option pricing method for European options based on the Fourier-cosine series, and call it the COS method. The convergence rate of the COS method is exponential and the computational complexity is linear. It has a wide range of applicability for different underlying dynamics, including Lévy processes and Heston’s stochastic volatility model, and for various types of option co...

2015
Xueling Dai Wanqi Hou Yaxuan Sun Zhaolan Gao Shigong Zhu Zhaofeng Jiang Vassilios Roussis

Alzheimer's disease (AD) is characterized by a large number of amyloid-β (Aβ) deposits in the brain. Therefore, inhibiting Aβ aggregation or destabilizing preformed aggregates could be a promising therapeutic target for halting/slowing the progression of AD. Chitosan oligosaccharides (COS) have previously been reported to exhibit antioxidant and neuroprotective effects. Recent study shows that ...

Journal: :American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics 2007
Rael L Bernstein Charles B Preston Judith Lampasso

INTRODUCTION The orthodontic technique favored by a clinician frequently determines how a deep curve of Spee (COS) is leveled. The primary purpose of this investigation was to confirm radiographically the long-term effectiveness of a continuous archwire technique--the Alexander discipline--in leveling the COS in patients with Class II Division 1 deep-bite malocclusions treated without extractio...

Journal: :Oncology reports 2014
Zhiguo Luo Xiaoxia Dong Qing Ke Qiwen Duan Li Shen

Chitooligosaccharides (COS) are hydrolyzed products of chitosan and have been proven to exhibit various biological functions. The aims of this study were to investigate the mechanisms underlying the hepatoprotective effects of COS against ethanol-induced oxidative stress in vitro. Human L02 normal liver cells were pretreated with COS (0.25, 0.5 and 1.0 mg/ml) and then hepatotoxicity was stimula...

2010
Sabrina L. Andersen Jeff Sekelsky

Studies in the yeast Saccharomyces cerevisiae have validated the major features of the double-strand break repair (DSBR) model as an accurate representation of the pathway through which meiotic crossovers (COs) are produced. This success has led to this model being invoked to explain double-strand break (DSB) repair in other contexts. However, most non-crossover (NCO) recombinants generated dur...

1995
J. E. Hetrick Y. Hosotani

QED with N species of massive fermions on a circle of circumference L is analyzed by bosonization. The problem is reduced to the quantum mechanics of the 2N fermionic and one gauge field zero modes on the circle, with nontrivial interactions induced by the chiral anomaly and fermions masses. The solution is given for N = 2 and fermion masses (m) much smaller than the mass of the U(1) boson with...

Journal: :Plant physiology 1988
T Ogawa R K Togasaki

Cells of a high CO(2)-requiring mutant (E(1)) and wild type of Synechococcus PCC7942 were incubated with COS in the light, then suspended in COS-free medium and their CO(2) exchange was measured using an open gas-analysis system under the conditions where photosynthetic CO(2) fixation is inhibited. When the suspension of cells untreated with COS was illuminated, the rate of CO(2) uptake was hig...

Journal: :Physical chemistry chemical physics : PCCP 2015
P Piazzetta T Marino N Russo

In order to give insights into the working mechanism of the novel characterized enzyme carbonyl sulphide hydrolase (COSase), which efficiently converts COS into H2S and CO2, we have performed a detailed theoretical investigation using the framework of density functional theory (using B3LYP and M06 exchange-correlation functionals) by the cluster model approach. In the final part of the reaction...

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