14 research outputs found
The Response of Lemna minor to Mixtures of Pesticides That Are Commonly Used in Thailand
In the field, aquatic organisms are exposed to multiple contaminants rather than to single compounds. It is therefore important to understand the toxic interactions of co-occurring substances in the environment. The aim of the study was to assess the effects of individual herbicides (atrazine, 2,4-D, alachlor and paraquat) that are commonly used in Thailand and their mixtures on Lemna minor. Plants were exposed to individual and binary mixtures for 7 days and the effects on plant growth rate were assesed based on frond area measurements. Experimental observations of mixture toxicity were compared with predictions based on single herbicide exposure data using concentration addition and independent action models. The single compound studies showed that paraquat and alachlor were most toxic to L. minor, followed by atrazine and then 2,4-D. For the mixtures, atrazine with 2,4-D appeared to act antagonistically, whereas alachlor and paraquat showed synergism
Febrile seizures after 2009 influenza A (H1N1) vaccination and infection: a nationwide registry-based study
Surgery and risk for multiple sclerosis: a systematic review and meta-analysis of caseâcontrol studies
alpha-fetoprotein levels in maternal serum during pregnancy and maternal breast cancer incidence
Asymptomatic coronary artery disease in a Norwegian cohort with type 2 diabetes: a prospective angiographic study with intravascular ultrasound evaluation
"Wings of the Kite-Hawk" by Nicholas Rothwell. [review - radio script]
"Wings of the Kite-Hawk", subtitled "A Journey into the Heart of Australia", is
journalist and novelist Nicolas Rothwellâs personal account of getting to know
the interior of Australia: the tracks of the European explorers, the ancient sites
and modern inhabitants, the landscapes; and the art, old and new, into which the
landscape has been transformed by human hands.
Rothwellâs interest is first aroused by the journals of the explorer
Ludwig Leichhardt, and the book begins in Cape York, where he discovers
traces of Leichhardtâs expedition. He is led from Leichhardt on to other inland
explorers: Charles Sturt, Ted Strehlow and Ernest Giles. The book is loosely
structured around his investigations of the trails of these men. But his interest is
not in heroics or achievements. He sees them as writers and approaches them
through their journals