نتایج جستجو برای: ban analysis

تعداد نتایج: 2829750  

Journal: :Nature 1982

Journal: :Nature 1992

Journal: :Science 2009
Christian Wallner

427 COVER Human cells infected with the protozoan parasite Toxoplasma gondii visualized by scanning electron microscopy. In the foreground are parasites (yellow-green) rupturing out of a dying host cell (blue); in the background is an intact host cell containing a large parasite-filled vacuole. See page 530.

2004
Richard G. Dudley

Because enforcement of forestry law has become extremely difficult in Indonesia, a ban on export of logs has been suggested as a means of controlling over-harvest and illegal logging. A model of a log export ban can help us visualize its effects on the forestry sector. The model consists of simplified overviews of: the wood processing sector, demand – price feed back loops, forest standing stoc...

Journal: :Nature Biotechnology 1999

2008
Elizabeth H. Humphreys Sarah Janssen Ann Heil Patricia Hiatt Gina Solomon Mark D. Miller

INTRODUCTION There are increasing concerns over the presence and implications of pharmaceutical agents in water. In 2002, California banned pharmaceutical use of lindane because of concerns about water quality, as lindane treatment for head lice and scabies was found to be a significant factor adversely affecting wastewater quality. OBJECTIVES In this article we describe the effects the ban h...

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