[Physical and chemical maturity indexes and Fourier transform infrared (FTIR)spectroscopy of animal manures during composting.].

The composting experiments on three manures (cattle, pig and chicken manures) were carried out to study the maturity indexes by monitoring their physical and chemical properties, seed germination index (GI), and characterizing chemical structures using Fourier transform infrared (FTIR) spectroscopy. Results showed that temperature changed during composting, and the numbers of peak temperatures for cattle, chicken, and pig manures were 1, 2 and 2, respectively. The duration with temperature higher than 50 ℃ was longer than 10 days for all the three manures.

[Study on chemical compositions and crystallinity changes of bamboo treated with gamma rays].

The structures and qualities of main chemical compositions in cell wall of bamboo treated with gamma rays were tested by nuclear magnetic resonance spectrometer (NMR) and X-ray Diffraction (XRD). The result indicated that the bamboo crystallinity increased at the beginning of irradiation process, while the crystallinity reduced when the irradiation dose was raised to about 100 kGy. During the whole irradiation process, hemicellulose degraded, and with the irradiation doses increased the non-phenolic lignin changed to the phenolic.

[Study on bamboo treated with gamma rays by X-ray diffraction].

The microfibril angle and crystallinity of bamboo treated with gamma rays were tested by X-ray diffraction (XRD). The result indicated that crystallinity in bamboo increased when irradiation dose was less than 100 kGy, while the irradiation dose was raised to about 100 kGy, crystallinity in bamboo reduced. But during the whole irradiation process, the influence on microfibril angle was not obvious, so it was not the dominant factors on variation in physical-mechanical properties of bamboo during the process of irradiation.