Five species of macroalgae, namely Sargassum wightii, Padina tetrastromatica, Ulva lactuca, Caulerpa racemosa and Gracilaria edulis collected from three sampling sites, viz. Harbour Beach (site 1), Tharuvaikkulam 2) Hare Island 3), situated along the Thoothukudi region Gulf Mannar were analysed for 17 organochlorine pesticides (OCPs) by gas chromatography-mass spectrometry (GC-MS) to assess the...

I t i s known t h a t some o r g a n o c h l o r i n e i n s e c t i c i d e s a r e a b l e t o i n d u c e s y n t h e s i s o s h e p a t i c m i c r o s o m a l e n z y m e s t h a t c a t a l y s e t h e m e t a b o l i s m o s d r u g s a n d o t h e r chemical a g e n t s . (HART & FOUTS 1963,1965: HART et ai.1963) This induction of the enzymatic activity of hepatic cells, which are resp...

The effects of nutrients and planktivory on the accumulation of hydrophobic organic contaminants (HOCs) in aquatic food chains were investigated in large lake enclosures. Food-chain compositions in the enclosures were manipulated by additions of planktivorous fish (+F), nutrients (+N), both nutrients and fish (+NF), or received no additions (-NF). The treatments resulted in higher plankton but ...

From 1940 through the 1970s, organochlorine compounds were widely used as insecticides in the United States. Thereafter, their use was severely restricted after recognition of their persistence in the environment, their toxicity in animals, and their potential for endocrine disruption. Although substantial evidence exists for the fetal toxicity of organochlorines in animals, information on huma...

Abstract Organochlorine is a synthetic pesticide that has been banned in many countries because of its high persistence the environment and can accumulate animals. The goal our study was to determine level organochlorine residues surface water mussel Corbicula sumatrana Lake Singkarak. Water samples were collected from 10 sampling sites Singkarak, Batu Taba, Sumpur, Guguk Malalo, Ombilin, Tikal...

The levels of 18 organochlorine pesticides (OCPs) in the water from Lake Chaohu were measured by a solid phase extraction-gas chromatography-mass spectrometer detector. The spatial and temporal distribution, possible sources, and potential ecological risks of the OCPs were analyzed. The annual mean concentration for the OCPs in Lake Chaohu was 6.99 ng/L. Aldrin, HCHs, and DDTs accounted for lar...

The explosion and collapse of the World Trade Center (WTC) was a catastrophic event that produced an aerosol impacting many workers, residents, and commuters during the first few days after September 11, 2001. During the initial days that followed, 14 bulk samples of the settled dust were collected at locations surrounding the epicenter of the disaster, including one indoor location. Some sampl...