Manila Journal of Science

An Antifungal Sesquiterpene Lactone from Pseudoelephantopus spicatus C. Ragasa, G. Alea, and J. Rideout Abstract A sesquiterpene lactone was obtained from the chloroform extract of Pseudoelephantopus spicatus Rohr. Its structure was elucidated by 1D and 2D NMR spectroscopy. It was …

A Contemporary Theory on Learning and Teaching Mathematics: Implications for School Mathematics Curriculum A. Limjap Abstract This paper presents the conceptions of school mathematics learning and practices on instruction which mathematics educators, theorists, researchers and practitioners deem prevalent and will …

Singular and Non-Singular Oriented Wheels S. Gervacio Abstract This paper extends the concepts of singular and non-singular graphs to diagraphs. Reduction formulas are established here and used to investigate oriented wheels. All orientations of a wheel which yield a singular …

A Teacher's Nomograph S. Gervacio & S. Tan   Abstract This paper discuss the use of a graphic representation known as nomograph in the computation of weighted average of a student's grades. Other interesting applications as well as their mathematical …

Synthesis of D-Galactose-Modified 1,3-DiThiole-2-Thione Derivative G. Alea, P. Alto, E. Garcia, G. Janairo, J.M. Quibilan, and D. Yu Abstract A procedure for the synthesis of the novel 4-mercapto-5-(6-O-2'-ethylene-1,2:3,4-di-O-isopropylidenegalactopyranosylthio)-1,2-dithiole-2-thione (7) is described. View PDF

Studies on Some Protozoan Coccidian Zoonotic Infections in the Philippines: A Review F. Claveria Introduction The Philippines, off the coast of Asia and a little above the equator is endowed with a tropical climate all year round, with temperatures ranging …

Quasilocal Background Approach to the One-loop Effective Action E. Rodulfo and M. Tiamzon Abstract The one-loop effective action that accommodates an arbitrary number of covariant derivatives of a strong but slowly-varying background field is presented in closed form. The internal …