Sara Bagheri - Academia.edu (original) (raw)

Papers by Sara Bagheri

Journal of Computational Physics, 2016

Nature Communications, 2014

Journal of Biologically Active Products from Nature, 2012

ABSTRACT Walnuts contain several antioxidant compounds which are thought to contribute to their b... more ABSTRACT Walnuts contain several antioxidant compounds which are thought to contribute to their biological properties. The present work investigated the various antioxidative activities of walnut (Juglans regia L.) green husks hydroalcoholic extract (W) and its effect on oxidation of LDL induced by CuSO 4 in vitro by monitoring the formation of conjugated dienes and thiobarbituric acid reactive substances (TBARS). It was demonstrated that total antioxidant capacity of W was 307±30 nmol of ascorbic acid equivalents/g W. The W showed remarkable scavenging activity on 2,2-diphenyl-picrylhydrazyl (DPPH) (IC 50 1819 μg/ml). Total

Journal of Chemistry, 2013

ABSTRACT Commercial flakes of graphite were prepared into functionalized graphene oxide (GO) by c... more ABSTRACT Commercial flakes of graphite were prepared into functionalized graphene oxide (GO) by chemical treatment. After the exfoliation and intercalation of graphene into functionalized graphene oxide that formed stable colloidal dispersion in polar aprotic solvent, the reduction process was undertaken by continuous stirring with hydrazine hydrate. The reduced material was characterized by X-ray diffraction (XRD), attenuated total reflectance (ATR) FT-IR, ultraviolet visible (UV-vis), atomic force microscopy (AFM) and Raman spectroscopy which confirm the oxidation of graphite and reduction of graphene oxide into graphene sheet.

Journal of Magnetism and Magnetic Materials, 2015

Applied Mechanics Reviews, 2014

ABSTRACT Research on active control for the delay of laminar-turbulent transition in boundary lay... more ABSTRACT Research on active control for the delay of laminar-turbulent transition in boundary layers has made a significant progress in the last two decades, but the employed strategies have been many and dispersed. Using one framework, we review model-based techniques, such as linear-quadratic regulators, and model-free adaptive methods, such as least-mean square filters. The former are supported by a elegant and powerful theoretical basis, whereas the latter may provide a more practical approach in the presence of complex disturbance environments, that are difficult to model. We compare the methods with a particular focus on efficiency, practicability and robustness to uncertainties. Each step is exemplified on the one-dimensional linearized Kuramoto-Sivashinsky equation, that shows many similarities with the initial linear stages of the transition process of the flow over a flat plate. Also, the source code for the examples are provided.

BioMed Research International, 2014

SIAM Journal on Applied Dynamical Systems, 2010

Proceedings of the National Academy of Sciences, 2006

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2011

This review gives an account of recent research efforts to use feedback control for the delay of ... more This review gives an account of recent research efforts to use feedback control for the delay of laminar-turbulent transition in wall-bounded shear flows. The emphasis is on reducing the growth of small-amplitude disturbances in the boundary layer using numerical simulations and a linear control approach. Starting with the application of classical control theory to two-dimensional perturbations developing in spatially invariant flows, flow control based on control theory has progressed towards more realistic three-dimensional, spatially inhomogeneous flow configurations with localized sensing/actuation. The development of low-dimensional models of the Navier-Stokes equations has played a key role in this progress. Moreover, shortcomings and future challenges, as well as recent experimental advances in this multi-disciplinary field, are discussed.

Journal of the American Academy of Dermatology, 2002

In the general population, squamous cell carcinomas (SCCs) of the male genitalia are rare. Ten ye... more In the general population, squamous cell carcinomas (SCCs) of the male genitalia are rare. Ten years ago, we documented a significant dose-dependent increase in the risk of malignant genital neoplasms among men treated with psoralen plus ultraviolet A (PUVA). Since that time, fewer cohort patients have used PUVA, and genital protection among PUVA users is likely to be frequent. Our aim was to determine the incidence and risk factors for genital neoplasms since 1989 and risk factors for these neoplasms among patients treated with PUVA. We conducted a prospective cohort study of 892 men first treated with PUVA in 1975-1976. Twenty-four men (2.7%) had 51 genital neoplasms, including 10 patients with a first tumor after May 1, 1989 (the ending date for our 1990 report). Since May 1, 1989, the incidence of invasive penile and scrotal SCCs was elevated 52.6-fold (95% confidence interval, 19.3-114.6) compared with that expected for the general white population. Multivariate models revealed the highest genital tumor risk among men with high-dose exposure to both PUVA and topical tar/ultraviolet B, with an incidence rate ratio of 4.5 (95% confidence interval, 1.3-16.1) compared with the low-dose exposure group. Although use of PUVA has decreased and genital shielding in our cohort has increased, the dose-dependent increase in the risk of genital tumors in men treated with PUVA has persisted. Particularly high risks occur among those with high-dose exposures to both PUVA and topical tar/ultraviolet B.