Chemicals. (S)-MPAC/(R)-MPAC.

Chemicals & Polymers SOLVENT CLEANING : ZCZ ’ S NEW PRODUCT DEVELOPMENT

1. INTRODUCTION Over the past 60 years, for the reasons shown in Figure 1, the engineering industry has found halogen-containing cleaning solvents to be technically very effective. More recently, the chemical inertness, non-flammability, low toxicity and convenience of 1,1,2-trichlorotrifluoroethane, has led to the wide use of products based on CFC-113 in electronics applications. Evidence of t...

Fenton ́s Process for the Treatment of Mixed Waste Chemicals

In recent years, with an increase in the stringent water quality regulations due to environmental concerns, extensive research has focused on upgrading current water treatment technologies and developing more economical processes that can effectively deal with toxic and biologically refractory organic contaminants in wastewater. In this context, in order to avoid or mitigate the possible advers...

Nature's chemicals and synthetic chemicals: comparative toxicology.

The toxicology of synthetic chemicals is compared to that of natural chemicals, which represent the vast bulk of the chemicals to which humans are exposed. It is argued that animals have a broad array of inducible general defenses to combat the changing array of toxic chemicals in plant food (nature's pesticides) and that these defenses are effective against both natural and synthetic toxins. S...

Observing preschoolers' social-emotional behavior: structure, foundations, and prediction of early school success.

Social-emotional behavior of 352 3- and 4-year-olds attending private child-care and Head Start programs was observed using the Minnesota Preschool Affect Checklist, Revised (MPAC-R). Goals of the investigation included (a) using MPAC-R data to extract a shortened version, MPAC-R/S, comparing structure, internal consistency, test-retest reliability, and stability of both versions; and, using th...

Industrial Chemicals