Analyzed were serum levels of IgA, IgG, ad IgM in groups of institutionalized and noninstitutionalized Down's syndrome subjects and in institutionalized retarded children with other etiologies. (KW)

A comparison of plasma (pseudo) cholinesterase and erythrocyte (true) cholinesterase activity in 16 male childhood schizophrenic patients and 16 male nonpsychotic hospitalized controls revealed no significant differences between the two groups. (Author)

Reviews evidence from molecular genetics and biochemistry, which supports the idea of some evolution, due to chance and selectively neutral mutations, occurring independently of natural selection. (AL)

Traces the origins of molecular biology to the work of 19th century biophysicists, ultrastructurists and collodial chemists. The development of the Aggregate Theory,and its overthrow by the Macromolecule Concept is described. Research in molecular genetics in the pre-second world war period, and the effects of the war on it, are briefly reviewed.…

This paper was presented at the annual meeting of the American School Health Association, Dental Health Section, University of Alberta, Edmonton, Alberta, Canada, November 10, 1968.

Discusses reactions and characteristics of fast atom bombardment (FAB) mass spectroscopy in which samples are ionized in a condensed state by bombardment with xenon or argon atoms, yielding positive/negative secondary ions. Includes applications of FAB to structural problems and considers future developments using the technique. (Author/JN)

Mid-nineteenth century work by Mendel on plant hybrids and by Pasteur on fermentation gave birth by way of bacterial genetics to modern-day molecular biology. The bacterium Escherichia Coli has occupied a key position in genetic studies leading from early gene identification with DNA to current genetic engineering using recombinant DNA technology.…

Procedures are provided for separating the principal metalloproteins (albumin, ceruloplasmin, and transferrin) from plasma using column chromatographic techniques. The experiment can be completed in two separate three-hour laboratory periods during which column chromatography is illustrated and the effect of pH on charge and affinity of a protein…

Historically described are research studies which led to the current explanation of the two kinds of intracellular transport-axoplasmic flow and axoral transport. Models explaining their fundamental mechanism and the kinds of materials they convey are presented. (BT)

Describes the database, calculations, and various display modes of a computer subroutine that calculates the chemical score (or index of degree of balance) of essential amino acids in a protein and presents displays useful in illustrating concepts of protein complementarity. (DC)