隐藏 发表于 2025-3-23 12:11:23
Polycyclic aromatic hydrocarbons (polynuclears) in foods,ic hydrocarbons (PAH) in the environment has received continuous attention. As a result numerous reviews have been published, the most recent ones being the following: . and . (1970), . (. 1972), . (. 1975). (. 1973). A symposium on PAH has also been held recently (. and . 1976).Hippocampus 发表于 2025-3-23 17:49:57
Toxaphene,riety of insect pests (. and . 1952). Chemically, toxaphene is a complex mixture of chlorinated camphene derivatives containing 67 to 69% chlorine. Recent research had disclosed that this complex substance contains at least 177 separate components (.. 1974, .. 1974).使显得不重要 发表于 2025-3-23 20:52:00
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in which the precession movement of the earth axis, the orbital characteristics of the earth around the sun and cycles of sun spot activity play a role. Such astronomically induced cyclicity should be of regional to (sub) continental importance. This was the case during most of the Pleistocene. Sinc谦卑 发表于 2025-3-24 16:40:58
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ng people acting ethically towards an environment facing the current anthropogenic global change. Drawing on the Semiotic Cultural Psychological Theory that acknowledges a dynamic notion of culture, this chapter aims to delve into such a fruitful issue contending that the way people respond to the q