The results showed that senescence was accelerated and iron reutilization in roots was increased after application of exogenous ethylene to primary leaves, which lead to active Fe and Fe content of young leaves and its improvement of iron.

The results demonstrated that the plants fed with NH + 4 N had a much higher content of physiological available Fe, chlorophyll in young leaves and Fe reutilization efficiency than that in plants fed with NO - 3 N.

It also discussed the feasibility of sewage reuse,for which various models of sewage reuse,quality requirements,main technologies have been put forward.

Wastewater as a resources for reuse is important to social sustainable development.

Strengthening the reuse of hot mixed bitumen pavement is of significance for reducing maintenance cost.

Coating technology and reuse of old waveform guardrail of highway;

Design of a system for drilling fluid recovery, purification and reuse;

Analysis of status quo in reuse of wastewater as a potential water resource;

Analysis of recycling use of dyeing and finishing water resource in textile industry;

Basic characteristics and recycling of aged refuse in landfill;

Discussion on old industrial plant reformation and recycling with Sifang machine plant as example

Industrialization chain and economy analysis of recycling waste concrete;

Current Status for Wasted FRP Recycling in Japan;

Study of recycling building waste;