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Zahorsky (1922) stated that he was inclined to the view that calomel was the causative agent in pink disease. However, some patients were encountered having no history of calomel ingestion, so the idea was dismissed. Lesesne Smith of South Carolina considered that mercury was involved. His belief led Davison (1938) to include mercury as the aetiological(More)
Based on system theory, a coupling coordinated development model of ecological-economic system in Loess Plateau was established, and the evaluation criteria and basic types of the coordinated development of the ecological-economic system were proposed. The county-level coupling coordinated development of the ecological-economic system was also discussed,(More)
Taking the crop-fruit farming system in Xipo Village in Chunhua, Shaanxi Province as a case, the energy flow path, input and output structure, and the indices of energy cycle for the agriculture, fruit, stockbreeding and human subsystems were compared between 2008 and 2010. Results showed that during the study period the total investment to the(More)
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