[show abstract][hide abstract] ABSTRACT: In the present frame of work, optical bistability using a Fabry-Perot cavity containing bis (4-dimethylaminodithiobenzyl)-nickel (BDN) dye entrapped in PMMA matrix is experimentally investigated by using a single-mode Q-switched nanosecond Nd: YAG laser operating at 532 nm. The optical nonlinear parameters such as nonlinear refractive index (n
2) and cubic susceptibility (χ
3) of the material are numerically estimated from bistability loop. The origin of optical bistable behavior is attributed to nonlinear refraction. The study shows that BDN dye in solid-state matrix is a promising candidate for optical switching element.
[show abstract][hide abstract] ABSTRACT: With the ever-increasing risk for fungal infections, one can no longer ignore fungi. It is imperative that clinical manifestations "presume fungus" with their epidemiologic and pathogenic features when evaluating a potentially infected patient. In the high-risk patient groups, fungi with intrinsic resistance to antifungal agents already exist, with a tendency to emerge as opportunistic pathogens. One of the smart pathogens is Macrophomina phaseolina, with the potential to disarm plant, animal, and human immunity. The response prophylaxis may vary from antifungal therapy and surgical measures to biochemical (Rhizoctonia bataticola lectin [RBL] with antitumor and cytotoxic nature) and gene therapeutics.
European Journal of Clinical Microbiology 05/2011; 31(2):101-7.