Journal of Chemical Education. Oct92, Vol. 69 Issue 10, p779. 4p. 12 Diagrams.
Subjects
CHEMISTRY education in universities & colleges and ORGANIC chemistry
Abstract
Discusses a modern approach to teaching organic chemistry. Organic chemistry courses must begin with structure. Suggests using nuclear magnetic resonance spectroscopy to introduce structure; Introduce students to symmetry axes and planes; Review valence of hydrogen and first-row elements; Give them the equation for calculating the number of sites of unsaturation from the molecular formula; Give students the results of 13C{1H} DEPT with details later; More.
Examines proposed partial least squares (PLS) multivariate statistical models for predicting concentration of hydrocarbon- and oxygen-containing functional groups for a calibration set of model homopolymers. Plasma-deposited films; Static secondary ion mass spectrometry (SIMS); PLS modeling; Preprocessing; Prediction of surface oxygen and hydrogen concentration.
Journal of Nutrition. Nov1993 Supplement, Vol. 123, p1963S-1964S. 2p.
Subjects
NUTRITION education, HIGHER education, ACADEMIC degrees, UNIVERSITY & college entrance requirements, and COLLEGE teachers
Abstract
The article provides information on the degree programs related to food science and human nutrition being offered by Colorado State University, Fort Collins. Peter J. Bechtel is the program director at the university. Entrance requirements include GPA with an aggregate of more than or equal to 3; courses in general chemistry, organic chemistry, biochemistry and physiology all with laboratories; and GRE aptitude test. The university offers both M.S. and Ph.D. degree programs. The M.S. program emphasis in nutritional science or applied nutrition is offered with either a thesis or non-thesis option. The Ph.D. degree emphasizes basic sciences with research in nutritional biochemistry, nutrition education or food science. The M.S. degree requires 35 credits and a final exam, whereas the Ph.D. requires a minimum of 50 credits beyond the M.S. Tuition and fees per year are $2,874.08 for resident and $8,572.08 for nonresidents. The faculty include K.G.D. Allen, J.E. Anderson, G.W. Auld, P.J. Bechtel, S. Gregary and others.
SEDIMENTATION & deposition research, OCEAN bottom, and CARBONATE minerals
Abstract
Discusses the mechanism underlying the relative deposition rates of organic carbon and calcite to the sea floor. Effect of total calcite concentration on the specific depth at which calcite dissolves; Control of atmospheric carbon dioxide by ocean carbonate chemistry; Organic carbon degradation in the sediments.
GUMS & resins, ALLERGIES, COLOPHONS, GLYCERYL ethers, PATIENTS, and NUCLEAR magnetic resonance
Abstract
In the esterification of rosin with glycerol, the main compound formed, glyceryl triabietate, shows low allergenic activity. In this study, compounds formed in smaller amounts, when abietic add (main component in rosin) was esterified with glycerol, were identified as glyceryl-1-monoabietate (GMA), glyceryl-1,2-diabietate (GDA,1,2) and glycery-1,3-diabietate (GDA1,3), using nuclear magnetic resonance (NMR), infra-red (IR) and mass spectrometry (MS) analyses. According to animal experiments, OMA was a contact allergen. No cross-reactivity was seen to allergens in unmodified rosin. Some patients allergic to unmodified rosin reacted when tested with GMA. No reactions were seen to the 2 diabietates. Some patients also reacted to commercial glycerol-modified rosins. OMA together with unmodified abietic acid were identified in these rosin samples. The reactions seen in rosin-sensitive patients to commercial glycerol-esterified rosins probably derive from the unmodified material still present in the product, but could also be the result of OMA obtained from the glycerol derivatization. [ABSTRACT FROM AUTHOR]
