The temperature dependence of magneto-optical and magneto-photoconductivity measurements were carried out in the range of (200-330) K. A home made optical cryostat was used for the measurements. The measured room temperature value of the energy gap was found to be 2.211 eV. The temperature coefficient of energy gap was found to be -5.48×10-4 eV/K obtained by the optical absorption method and -4...

This paper describes the kinetic study of a number of gas-phase reactions involving neutral Ca-containing species, many of which are important for describing the chemistry of meteor-ablated calcium in the Earth's upper atmosphere. Ca atoms were produced thermally in the upstream section of a fast flow tube, and then converted to the molecular species CaO, CaO(2), CaO(3), CaCO(3) or Ca(OH)(2) by...

Biology is taught in the second year of old Secondary Science curriculum; however currently, it every Enhanced Basic Education Curriculum a Spiral progression approach. With this, researcher determined performance Grade 10 students at rural school K–12 spiral progression. A total 76 were given an Achievement Test that covered competencies from Grades 7 – 9 before beginning third quarter (Biolog...