Melasma is a common acquired hypermelanosis of the skin that has been associated with several etiologic factors including ultraviolet light exposure, pregnancy, and oral contraceptives (OCPs) (1). Forty-one percent of women surveyed in one study had onset of melasma after pregnancy, and 25% after starting an OCP (2). Women who develop melasma during pregnancy may be more susceptible to developi...

Primary dysmenorrhea is painful menstrual cramps without any evident pathology to account for them, and it occurs in up to 50% of menstruating females and causes significant disruption in quality of life and absenteeism. Current understanding implicates an excessive or imbalanced amount of prostanoids and possibly eicosanoids released from the endometrium during menstruation. The uterus is indu...

Fifty-six representative samples of topsoil were collected around Guanting Reservoir, which is an important water source for Beijing. Concentrations of the insecticides HCH, DDT, and their metabolites were quantified by use of gas chromatography (GC) with electron capture detection (ECD). Organochlorine pesticides (OCPs) are still present in surface soils in the Guanting area. DDT accounts for ...

OBJECTIVES Use of oral contraceptive pills (OCP) increases the risk of cerebral venous sinus thrombosis (CVST). Whether this risk varies by type, duration, and other forms of hormonal contraceptives is largely unknown. This systematic review and meta-analysis update the current state of knowledge. METHODS We performed a search to identify all published studies on the association between hormo...

Persistent organochlorines such as ΣDDT, chlordane, hexachlorobenzene (HCB), heptachlor and endosulfan were determined in water and sediment samples of freshwater systems in the Eastern Cape Province of South Africa that receive runoff from agricultural lands and effluents from industries. The organochlorine pesticides (OCPs) in water and sediments were determined by liquid/liquid extraction an...

The programming of complex tasks with robot manipulators faces the challenges complying to constraints and needing account for several, sometimes conflicting performance objectives. Optimal control problems (OCP) are able explicitly these by solving constrained optimization find optimal trajectories that realize such tasks. wide adoption OCPs, however, is restricted high engineering cost comput...

Soil constitutes the central environmental compartment that, primarily due to anthropogenic activities, is recipient of several contaminants. Among these are organochlorine pesticides (OCPs), which major concern, even though they were banned decades ago their persistence and health effects can elicit. In this review, an overview monitoring studies regarding OCPs in soils published over last 30 ...