Coumarin and its derivatives represent one of the most active curriculums compound possessing a broad spectrum biological activity along with other applications such as insecticide fragrance. There are various methodologies developed for synthesis coumarins. Classical routes to coumarins include Pechmann condensation, Knoevenagel Perkin reaction, Wittig condensation reactions. Researchers have ...

This study considers the suitability of using environmental wastes (polystyrene foam, sawdust and eggshell) for development composite materials ceiling boards. The were collected from dumping sites processed accordingly. elemental compositions eggshell examined Atomic Absorption Spectrometer (ASS) plasma-optical emission spectrometer (Optimal 3100XL Perkin Elmer) respectively. Properties sample...

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The fluorescence detection of polymerase chain reaction (PCR) products using the ABI Model 7700 Sequence Detection System (PE Applied Biosystems, Foster City, CA, USA) allows researchers to rapidly detect and quantify gene sequences without the need for labor-intensive post-PCR processing such as gel electrophoresis and radioactive hybridization (1). This, in conjunction with a built-in, 96-wel...

MANY analytical laboratories have available minicomputers or microcomputer systems which routinely find use for data analysis. Recent trends have been toward applying computers not only for computational capabilities, but also for on-line control and data .acquisition from actual analytical instru-mentation. Numerous analytical instruments are being designed to incorporate a computer system as ...

Psoralea corylifolia is the most important medicinal plant which has various secondary metabolites and its leaves are broadly used in many sectors due to antimicrobial activity. This study aimed find bio-active compounds of chloroform extract P. using Perkin-Elmer Gas Chromatography – Mass Spectrometry (GC-MS). The results GC-MS was appropriate database National Institute Standards Technology (...

In conjunction with ACS Fall 2023, the American Chemical Society Board of Directors met on Aug. 11 and 12, councilors convened 16. A number actions votes took place during these sessions. At board directors meeting, six journal editors were reappointed; three new named; approval was granted for Prism Award, which will recognize a public figure or prominent leader in their field who has backgrou...