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The twigs and leaves of Pithecellobium clypearia Benth have been used as a folk medicine for the treatment of diseases related to inflammation in southern China for many years. To search for novel bioactive constituents as lead structures for anti-inflammatory drug development, seven new 3, 3′-neolignans (1–7), together with four known ones (8–11) were isolated from the 70% EtOH extract of the twigs...
Integrated transportation hub operation company is the main operation entity which is the key to ensure the sustainable operation of transportation hub. Based on the successful benchmarking of the integrated transportation hub operation companies at home and abroad, and combined with the actual situation in Tianjin Railway Station, this paper designed the operation company organization of the integrated...
City integrated transportation Hub is quasi-commercial project with a great positive externality. It's hard to guarantee the normal operation of the transportation hub through relying on income produced by market mechanism, so a reasonable government subsidy mechanism is necessary. This paper took an analysis on the transportation hub externality based on externality theory and finally the external...
Based on the actual situation in Tianjin, the indicator evaluation system of city gas emergency capability was studied. The indicators which affect the emergency capability were divided into two grades, and then the indicator evaluation system was established. Based on the indicator evaluation system, the gas emergency capability of Tianjin was evaluated with the G1 method. The results show that the...
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