SCIENCE teachers, TEACHER training, CHEMISTRY education, HIGH schools, OCCUPATIONAL training, SECONDARY education, EFFECTIVE teaching, HIGH school students, and EDUCATION research
The article discusses studies about developments in professional training of science teachers in high schools in the U.S. A chemistry teacher should have as a minimum, college courses in general inorganic chemistry, organic chemistry, qualitative analysis, quantitative analysis and physical chemistry. Organic chemistry is studied because of the basic principles and general information involved and the important role organic substances play in modern life. One of the conclusions reached by the Committee on Preparation of High School Chemistry teachers is that more extensive training and other sciences is urgently needed in many cases and these needs should be met either by decreasing the requirements in educational course, by increasing the number of credits required for graduation.
SCIENTISTS, BIOLOGISTS, BIOLOGICAL research, SCIENTIFIC community, and OXYTETRACYCLINE
The article presents information on scientist Ben A. Sobin and his research achievements. He was born in Cleveland, Ohio, in 1912 and his graduate education took place at Ohio State University. He specialized in chemistry, organic chemistry, bacteriology and biochemistry. Professionally he worked in various organizations and his career with Pfizer Inc. began as chief of biologies control where he attained success in research assignment. One of them was the preparation of the first samples of Terramycin under Sobin's direction.
Synthetic Communications; January 1976, Vol. 6 Issue: 4 p313-318, 6p
Tetraalkyl ammonium (TAA) salts are of great importance in many areas of chemistry (organic, physical etc.). Tetraalkylammonium (TAA) chlorides, bromides or iodides are usually prepared by direct quaternization of trial-kyl amines with the corresponding alkyl halides. However other tetraalkylammonium (TAA) salts - cyanides, rhoda-nides, azides etc. cannot be prepared in this direct way. A typical method of preparation of these salts consists in ion exchange between available TAA halides and various salts containing the required anions. In some instances simply treating the TAA halides with aqueous solution of silver salts can be applied. This procedure, however, besides being costly is limited to the cases when the required silver salts are soluble in water1.