Potassium is an alkali-metal denoted by the chemical symbol K and atomic number Z = 19. It has been discovered in 1807 by deriving it from potassium hydroxide KOH. Being an alkali atom it has only one electron in the outermost shell and the charge of the nucleus is being shielded by the core electrons. This makes the element very chemically reactive due to the relatively low ionization energy o...

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The purpose of the present paper is to present some simplifying modifications of Pfltiger’s method (1) for the estimation of glycogen, that render it available for small amounts of tissue. The suggested modifications involve (a) shortening of the time necessary to hydrolyze the tissue with strong alkali, (b) facilitation of the separation of the glycogen by precipitating it in the presence of c...

The purpose of the present paper is to present some simplifying modifications of Pfltiger’s method (1) for the estimation of glycogen, that render it available for small amounts of tissue. The suggested modifications involve (a) shortening of the time necessary to hydrolyze the tissue with strong alkali, (b) facilitation of the separation of the glycogen by precipitating it in the presence of c...

The most commonly used method for biodiesel preparation is via transesterification of vegetable oil using alkaline catalysts. Biodiesel yield and oil conversion are affected by operating conditions including the catalyst formulation and concentration. Application of alkaline catalysts can also lead to undesired soap formation. This study evaluated the alkaline catalyst effects on biodiesel yiel...

HE PURPOSE OF THIS PAPER 5 to describe a micromethod for the fluorometric determination of calcium in blood serum, plasma, urine, and cerebrospinal fluid. The method is an adaptation of the fluorometric procedure of Wallach et al (1, 2) and Kepner and Hercules (3) to the TJnopette system* (4, s). The original procedure involved the preparation of a stock solution of Calcein or fluorescein compl...