By antimicrobial and cytotoxic-guided fractionation, a bioactive norquinone-methide triterpene, 15 alpha-hydroxypristimerin, was isolated from a South American medicinal plant, Maytenus scutioides. Its structure was determined on the basis of spectroscopic evidence. Successful chemical transformation of pristimerin to netzahualcoyene indicates that the 15-hydroxy compounds seems to be a possibl...

The manipulation of a Gaussian laser beam using conical diffraction in a high optical quality biaxial crystal of KGd(WO(4))(2) has been examined in detail with emphasis on the experimental techniques involved and intuitive explanations of the notable features. Two different optical arrangements were used to form the Pogendorff double-ring light pattern in the focal image plane. The formation of...

The linewidth of a KGd(WO ₄) ₂ (KGW) intracavity pumped Raman laser is analyzed experimentally for different configurations of the Raman and pump laser resonators: with narrow and broadband pump emission profiles, with and without linewidth narrowing elements in the Raman laser resonator, with and without injection seeding into the Raman cavity. The benefits of a narrow linewidth pump source in...

In this paper the problem of a plane strain hydraulic fracture propagating in an elasto-plastic material is analyzed. A new stress redistribution model for proximity tip formulated and resulting plasticity-dependent crack propagation condition introduced. modified variant KGD that accounts plastic deformations near-tip zone only proposed. It demonstrated can be credible substitute full case mod...

Recently, a fluid volume enrichment strategy based on the asymptotic solutions near crack tip was proposed for fluid-driven fracture propagation problems. Despite its successes in various benchmark and field-scale problems of hydraulic fracturing simulations, aforementioned has following limitations. First, tightly coupled solid-fluid nonlinear system cannot be consistently linearized due to fa...

INTRODUCTION The tobacco control effort in Turkey has made significant progress in recent years. Turkey initiated its tobacco control effort with the passing of Law 4207 (The Prevention of Harmful Effects of Tobacco Products) in 1996 and ratified the World Health Organization (WHO) Framework Convention on Tobacco Control (FCTC) in 2004. It is important to base policy decisions on valid and reli...

The development of original natural products known as ethnomedicine is expected to be useful a health and treatment effort for the community. Dissemination information through counselling techniques making Camellia sinensis Muntingia calabura teas in preventing diabetes mellitus. This activity aims increase knowledge ability community utilizing research-based medicinal plants demonstrations com...