What Are the Vitamins? (Eddy, W. H.)

Abstract

x -f 431 pp. 15 X 23 cm. $3.75. This text is a cooperative effort of the editor and twelve coauthors. Their aim has been to collect and unify the best available material on laboratory experiments for eleven of the unit operations of chemical engineering and to produce a practical laboratory manual. The authors have selected experiments that can be performed satisfactorily with simple equipment in a single laboratory period and which tie in definitely with the theoretical presentation of that unit operation.The unit operations selected and the number of experiments for each are: measurement of temperature, 5 experiments; flow of fluids, 10; flow of heat, 6; evaporation and evaporators, 3; distillation, 6; drying of solids, 9; humidification and dehumidification, 3; gas absorption, 8; filtration, 6; classification and concentration of solids, 7; size reduction, 9. This book is more than a mere laboratory manual, as each unit operation is introduced by sufficient theory and discussion to develop the formulas and show the significance of the variables to be measured in the experiments performed. Each experiment is divided into object, equipment needed, procedure {with alternatives), data to be taken, and the report. Although the chapters are not uniform in this respect, most of them give sample data and calculations necessary for the report.

High molecular weight hyaluronic acid inhibits advanced glycation endproduct‐induced NF‐κB activation and cytokine expression

“…There are two possible physiological causes for the decrease of the molecular weight of HA in vivo: aging and radicalinduced depolymerization. The average size of the HA polymers decreases with age, as measured in human cartilage (where the molecular weight drops from s 2 MDa in newborns to about 0.3 MDa at the age of 80) and in aqueous humor and vitreous body of rabbit and cattle [32,33]. The agerelated decrease in HA size might also be a reason for the increased susceptibility of the elderly to (AGE-induced) chronic in£ammations.…”

Enzymes Utilizing Glutamine as an Amide Donor

“…Binding of glutamine to the nascent site strengthens the subunit interactions. Glutamine had been shown earlier to be required for interaction 'of the Bacillus and Pseudomonas AS I and AS I1 subunits (Holmes and Kane, 1975;Queener et al, 1973).…”

Molecular Basis for Water-Promoted Supramolecular Chirality Inversion in Helical Rosette Nanotubes

“…Supramolecular chirality (SC) is the expression of absolute molecular chirality at the macromolecular level and generally results from the self-assembly of multiple copies of one or more chiral components or from the self-organization of chiral oligomeric systems (e.g., polymers, biopolymers). While there is literature precedent for solvent-induced chirality inversion, most of these reports dealt with host−guest complexes, polymers, biopolymers, liquid crystalline phases, or thin polymer films, 3a,g,i and provided limited mechanistic insight as to the role of solvent at the intermolecular level.…”