Most companion birds have no distinct sexual dimorphic traits.The aim of this study was to identify the CHD genes from sexual chromosomes of birds (ZW) from various tissue samples.Feathers, oral swabs, blood and various tissues (by necropsy) were collected from four Vines companion bird species (Gallus gallus domesticus, Melopsittacus undulatus, Ps
Canned Motor Pump (CMP) is widely used in petroleum, chemical, electric power, aerospace engineering, and military manufacturing industries due to its good sealing performance.In the structure of canned motor pump, the rotor of the motor and the impeller of the pump are fixed on the same shaft.Therefore, balancing the axial force and the radical fo
Music art is a form of conveying cultural information and humanistic emotions.From ancient times to the present, the form of music has undergone great changes.The change of music form is closely related to the change in dynasties, the development of the market economy, and the change in humanistic spirit.Today, the development of music has reached
We propose the design method for broadband acoustic metamaterials based on the concept of transformation acoustics.Two-dimensional distributed transmission-line (TL) models for full-tensor anisotropic electromagnetic metamaterials are applied to full-tensor anisotropic acoustic metamaterials and the design formulas are shown to uniquely determine t