BACKGROUND Emerging evidence suggests that sex steroid hormones may influence respiratory symptoms. The existing literature about the role of oral contraceptive pill (OCP) on respiratory disease is scarce and conflicting especially during the adolescent period. In this study, we aimed to investigate the effect of OCPs on current wheezing among adolescents and young adults. METHODS A questionn...

Emerging evidence suggests that exposure to endocrine-disrupting chemicals including persistent organic pollutants (POPs) such as organochlorine pesticides (OCPs), polychlorinated biphenyls (PCBs), and polybrominated diphenyl ethers (PBDEs) has a long term impact on human health. The goal of this pilot study was to test whether antioxidant intervention by vitamin C supplementation may be a reme...

Most organochlorine pesticides (OCPs) which are increasingly used in agriculture and industry are not biodegradable and thereby persist in the environment for a very long period of time. They are capable of negatively impacting the health of humans and biota when present in a higher concentration than recommended. This study evaluated the concentrations of 17 OCPs in surface water samples colle...

‎In this paper we introduce a numerical approach that solves optimal control problems (OCPs) ‎using collocation methods‎. ‎This approach is based upon B-spline functions‎. ‎The derivative matrices between any two families of B-spline functions are utilized to‎ ‎reduce the solution of OCPs to the solution of nonlinear optimization problems‎. ‎Numerical experiments confirm our heoretical findings‎.

Agricultural use of organochlorine pesticides (OCPs) increased during the twentieth century but many them have been progressively banned several decades after their introduction. Nevertheless, these lipophilic chemical compounds may persist in soils and sediments. From sediment deposits, it is possible to reconstruct chronology OCP releases relation former applications through time. long-term f...

Reduced basis approximations of Optimal Control Problems (OCPs) governed by steady partial differential equations (PDEs) with random parametric inputs are analyzed and constructed. Such based on a Order Model, which in this work is constructed using the method weighted Proper Orthogonal Decomposition. This Model then used to efficiently compute reduced approximation for any outcome parameter. W...

It is known that the consumption of seafood has several health benefits for humans. However, accumulation organic pollutants, such as polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs), in their flesh could pose public problems. Thus, concentrations PCBs OCPs edible fish species (Mugil bananensis, Sarotherodon melanotheron) from Sine Saloum Estuary located central-western Sen...

many of the persistent organic pollutants (pops) with endocrine disrupting properties are monitored regularly by risk assessors with limited resources, where analytical procedures are usually laborious, expensive, and not ecofriendly. moreover, these analyses were frequently advanced aiming one class of pollutants, consequently inefficient to correspond the demand of monitoring a quickly rising...

This paper presents a theoretical approach to optimal control problems (OCPs) governed by a class of control systems with discontinuous right-hand sides. A possible application of the framework developed in this paper is constituted by the conventional sliding mode dynamic processes. The general theory of constrained OCPs is used as an analytic background for designing numerically tractable sch...