Now showing items 11-20 of 29
Two Methods for the Evaluation of Six Disinfectants Using Pseudomonas Aeruginosa and Serratia Marcescens as the Test Organisms
A total of 50 isolates of Pseudomonas aeruginosa and 6 isolates of Serratia Marcescens from various clinical specimens were used in this study. The action of various commercial disinfectants on these isolates was studied ...
Explanation of the Shape of Calibration Graphs Obtained for Mercury, Zinc and Copper in Stream Water Samples
Calibration graphs have been obtained for mercury, zinc and copper ions using buffered (pH 7.4) stream water and centrifuged stream water samples. Two hypothesis explaining the shape of the obtained calibration graphs have ...
Kinetics and Mechanism of the Hydrolysis of Benzylidene Benzoylhyd - Razone Derivatives
The kinetics and mechanism of hydrolysis of a series of substituted benzylidene benzoylhydrazones (X — BBH) have been studied at five different temperatures in the range 25 — 45°c by U. V. -visible spectrophotometry. The ...
Homogeneous Catalysis of O-Silylation Reactions Using Tris (Acetylacetonato) Cobalt (III)
Tris (acetylacetonato) cobalt (III), (Co(acac)3), has been used to catalyze o-silylation reactions of R 3 Siff (R.z.Et,Et0) with R OH (Rt-Et, i-Pr, t-.Bu and C6Hj-). No reaction has been observed at room temperature, but ...
The Role of Solvent on the Kinetics and Mechanism of the Hydrolysis of Salicylidene Benzoyl Hydrazone
The effect of various solvents on the kinetics and mechanism of the hydrolysis of Salicylidene Benzoyl hydrazone (SBH) has been studied at five different temperatures (17-45 C) using U.V. and visible spectrophotometry. In ...
Pollution Levels of Drinking Water in Several Villages in Nablus Area and in the City of Hebronقياسات التلوث ببعض العناصر الكيميائية الضارة في مياه الشرب في عدد من قرى منطقة نابلس وفي مدينة الخليل
Samples of drinking water were collected from several villages in Nablus area, and from the city of Hebron. The concentrations of lead, copper, nickel, manganese, iron, zinc, magnesium and calcium were determined in these ...
Short Communication: Synthesis of 2-(Chiral Alkyl) Oxazolines
A modified Vorbruggen method has been used to prepare 2 - ( chiral alkyl ) oxazoline with phenyl and aminoacid residue. Other methods of preparation have been tested.
Pyridylazo Compounds As Analytical Reagents: A Review
A large number of 2-pyridylazo compounds have been proposed as reagents for the spectrophotometric determination of several metal ions. The application of 2-pyridylazo compounds for the determination of many metal ions is ...
Short Communication: Addition of Bis (methylthio) acetylene to Nitrilium Salts
Azaallenium salt 7 was isolated at low temperature by the addition of bis (methylthio) acetylene to nitrilium salts. The isolated azaallenium salt 7 was rearranged to afford the 1:1 heterocyclic adduct 8. A detailed mechanism ...
Photon Shadowing in Nuclei
Photonuclear Shadowing is studied using the Glauber - generalized vector meson dominance approach. The calculation is performed using both diagonal and off - diagonal generalized vector dominance (GVMD) models. The results ...