Tracing Acetylene Dissolved in Transformer Oil by Tunable Diode Laser Absorption Spectrum.

Dissolved gas analysis (DGA) is widely used in monitoring and diagnosing of power transformer, since the insulation material in the power transformer decomposes gases under abnormal operation condition. Among the gases, acetylene, as a symbol of low energy spark discharge and high energy electrical faults (arc discharge) of power transformer, is an important monitoring parameter. The current gas detection method used by the online DGA equipment suffers from problems such as cross sensitivity, electromagnetic compatibility and reliability.

[Study on karyotype and giemsa C-banding of Aquilaria sinensis].

Objective: To study Aquilaria sinensis (Lour.) Spreng chromosome karyotype and C-banding.

Method: Sections for karvotvpe and BSG method for C-banding.