Bisphenol A in German watersheds: Part II. FlowEQ model-based characterization of sources and current and future conditions.

Increasing scientific and regulatory concern regarding environmental concentrations of bisphenol A (BPA) increases the need to understand the sources and sinks of this chemical. We developed a coupled flow network/fugacity-based fate and transport model to assess the contribution of different emissions sources to the concentration of BPA in surface water in Germany. The model utilizes BPA loadings and sinks, BPA physicochemical properties, a water flow network, environmental characteristics, and fugacity equations.

Bisphenol A in surface waters in Germany: Part I. Reassessment of sources and emissions pathways for FlowEQ modeling.

Bisphenol A (BPA) enters the environment through various industrial and consumer-related pathways. Industrial sources include BPA manufacturing and secondary industrial uses such as the manufacturing of polymers and other substances based on or containing BPA. However, secondary sources and emissions to the environment, such as those related to the consumer use of articles containing BPA, may be more important than industrial emissions.

Students' knowledge of oral hygiene vs its use in practice.

Purpose: The purpose of the work is to estimate the knowledge connected with the rules of the oral hygiene and its correlation with everyday habits among the students of Dental studies and Medical Studies at Medical School in Lublin and Polytechnics of Lublin.

Material And Methods: A survey was conducted among 483 students: 58 2nd-year and 88 5th-year students of dentistry, 97 2nd-year and 51 5th-year students of medicine and 108 2nd-year and 81 5th-year students from The Polytechnics of Lublin.

Results: The study revealed that 50% students of dentistry, 32.

Mutual aid in remote areas: addressing the obstacles.

Mutual aid is a powerful tool for individual and group change and an excellent means of promoting mental and physical health. This article examines the main factors that may hinder the development of self-help groups (SHGs) in rural and remote areas, specifically the Sudbury-Manitoulin region of Northern Ontario. It considers several issues common to rural areas, such as population distribution, geographic isolation, lack and inaccessibility of human and material resources, and local factors such as multiculturalism and multilingualism.