Variation of acoustic impedance of metals in solid form with ultrasonic velocity

Abstract The acoustic impedance is an important characteristic of materials for nearly all sonic and ultrasonic applications. As in the electrical analogy it will determine the efficiency of every transmission in the system from one element to another. The acoustic impedance of an instrument for any particular fingering is one of the major factors which…

Incidence of cancer in breast lumps seen in a private rural surgical practice in South Eastern Nigeria

Abstract Background: There is increasing awareness and anxiety about breast cancer amongst rural women who present at our practice located in an area of limited resources. Aims:  To determine the incidence of breast cancer in patients presenting in our service with  breast lumps .                Patients and methods: This is a retrospective work, reviewing the pathology…