Selenium is an essential nutrient to the human body, but it can reach toxic levels causing a disease called selenosis. This article discusses selenium, its geographical distribution, toxicity, nutritional role, and carcinogenicity. (MA)

Provides activities which illustrate factors other than habitat destruction, such as wildlife trade and pollution that directly and indirectly endanger plants and animals. Focuses on sea turtles, introduced species and illegal wildlife trade. (ML)

This rejoinder to K. K. Fung's critique of the authors' data-envelopment analysis (DEA) article argues that eliminating inefficiency by competition requires perfect information, not just freedom of entry and exit. DEA provides the necessary information, but is not intended as a mechanism to replace peer review. (MLH)

Recent research shows lead poisoning is more widespread and even more dangerous to infants and young children than previously thought. A bill proposed in Congress would require schools and day-care centers to test for lead. Summarizes lead's health hazards and how to test drinking water. (MLF)

Supports the view that a teacher is needed to help students acquire foreign language skills and that language instruction cannot be exclusively entrusted to the language laboratory. (DS)

Drug/poison inhalation is described as a neglected dimension in the clinical intake process. Various technical concepts are explained with classification and diagnoses. (SS)

Two way analyses of variance and cross-group descriptive comparisons assessed the effectiveness of the Siop Poison Prevention Program, which included an educational program and the use of warning labels, on improving verbal and visual discrimination of poisonous and nonpoisonous products for preschool children. The study sample consisted of 156…

The fish poisons derived from plants used throughout the world, not only as piscicides but also for a range of other uses, including insecticident and in folk medicines, is presented. The aim of this review is to provide a useful background for students interested in natural products.

Presented are instructions for the use of "RATS," a model simulating the dynamics of a rat population in either a city or an apartment house. The student controls the conditions of growth and sets the points at which the computer program prints reports. The rat population is controlled by variables including garbage levels selected for the site,…

Because over 40,000 children are annually poisoned by household products, this guide for group leaders emphasizes hazards and preventive actions. Major objectives are defined: (1) to raise the audience's knowledge/awareness level concerning major hazards associated with potentially poisonous household products, (2) to point out primary hazard…

A Toxicologist discusses common misconception that all chemicals are poisonous to people and the environment and how these misconceptions are perpetuated. Describes what makes a chemical toxic. Defines related concepts including dose, acute and chronic toxicity, and natural verses synthetic chemicals. (MCO)

This research focuses on the examination of problems related to the national teacher performance appraisal system by the Thai Ministry of Education. It highlights major problems of the current performance appraisal system by delineating the weaknesses and pitfalls of the current appraisal system. The findings indicate problems to three major…

The author discusses the advantages of both the analytic and the anecdotal methods of evaluating and instructing the student teacher. (MM)

As practitioners have expanded their understanding of the types of events that constitute trauma exposure, the epidemiological database on prevalence suggests that childhood exposure to violence may best be framed as a public health crisis. There seems to be little recognition from policymakers and legislators, however, that violence may be the…

We investigate how L1 phonology and semantics affect processing of interlingual homographs by manipulating language context before, and auditory input during, a visual experiment in the L2. Three experiments contained German-English homograph primes ("gift" = German "poison") in English sentences and was performed by German (L1) learners of…