No abstract

The acetolactate synthase(ALS) activity, glutathione S-transferase(GST) activity and glutathione(GSH) content in maize was investigated in response to treatments with safener (S)-3-dichloroacetyl-2,2-dimethyl-4-ethyl-1,3-oxazolidine. When induced by the chiral compound, the GSH content in root and shoot of maize increased 91.10% and 71.66%, respectively, the recovery rate of ALS activity reached 77%, and the GST activity increased 103.77%. The activity of maize GST was also assayed towards chlorsulfuron in vitro; the results showed that the induction of GST activity against chlorsulfuron of 14.54% was obtained. The enhancement of GST activity was found to be concomitant with changes in kinetic constants, which was related directly to the enzyme affinity for the CDNB substrate.

An intelligent control model, called fuzzy self-organization model, is proposed based on the requirements of electromagnetic bionics system design principle and fuzzy algorithm. What the intelligent control model is and how it can be used in projects and the validation are elaborated. An intelligent control system - a heating system as selected, is developed according to the proposed model, in which the intelligent control model is constructed and coded into a DSP chip to organize the heating circuits/branches and control the heating procedure. The test results of the system show that the model can be carried out successfully, and the heating procedure is optimized by the settings of accurate heating temperature and the heating speed.

Two kinds of novel biobased materials were obtained by copolymerization of tung oil -based monomer (TOPERMA) or tung oil-modified unsaturated polyester (UPE-TO) with styrene. Mechanical and thermal properties of the two TO-based biopolymers were presented and compared. It was shown that the UPE-TO polymer matrix showed better toughness than the pure unsaturated polyester (UPE) matrix, while the TOPERMA polymer matrix had better thermal stability than the UPE-TO and the pure UPE matrixes by thermogravimetric analysis (TGA). These tung oil-based polymers show promise as an alternative to replace petroleum-based materials.