The quantity of effective labor in the work force depends not only on the number of workers employed but on how hard they work. Many explanations of the superior performance of the Japanese economy stress this fact. Japanese workers seem more dedicated and motivated than their American counterparts. We examine this phenomenon by comparing the effects of worker attitude on productivity and produ...

background: tourniquets used repeatedly on patients for blood sampling are a potential source of nosocomial infections. they harbor numerous microorganisms, including methicillin‑resistant staphylococcus aureus (mrsa). the aim of this study was to investigate tourniquets for the presence of microorganisms and to ascertain the infection control practices of health care workers. methods: a cross‑...

background: benzene, toluene, ethylbenzene and xylene (btex) are the most important toxic volatile compounds in the air and could be easily absorbed through the respiratory tract. in recent years, the risk of exposure to btex compounds, especially benzene as a carcinogen, has been considered in petroleum depot stations. objective: to assess the occupational exposure of petroleum depot workers i...

background: the lack of satisfaction and balance between the workload and abilities and limitations of individuals in various occupations may influence their general health. the aim of this study was to determine the effect of workload and job satisfaction on the general health of industrial workers.   materials and methods: this was a cross-sectional and correlational study on 215 workers of a...

Introduction DNA damage is among the main consequences of radiation. Of many different classes of DNA damage, double-strand breaks are the most deleterious. Development of a sensitive biodosimetry method, which utilizes a detection material with a similar construction to the body, seems essential for monitoring radiation workers. In this study, histone H2AX protein was examined as a potential  ...

The aim of the study was to compare bone lead concentrations in cortical and trabecular bones in long-term exposed primary copper and lead smelter workers, and to relate the measured concentrations to the previous lead exposure of the workers. Lead concentrations in seven bones (trabecular: sternum, vertebrae, iliac crest, rib; cortical: femur, left forefinger, and temporal bone) were determine...

This paper deals with the task-scheduling and worker-allocation problem, in which each skillful worker is capable to perform multiple tasks and has various regular and worker capacity to perform tasks, and the task allocation is operated with daily overhead. We propose a worker assignment model and develop a heuristic algorithm that is genetic algorithm whose performance is to be evaluated agai...

Metallic copper surfaces rapidly and efficiently kill bacteria. Cells exposed to copper surfaces accumulated large amounts of copper ions, and this copper uptake was faster from dry copper than from moist copper. Cells suffered extensive membrane damage within minutes of exposure to dry copper. Further, cells removed from copper showed loss of cell integrity. Acute contact with metallic copper ...

The research aims to establish a connection between the content of phospholipids, their fatty acid composition and sorption capacity honey bee head tissues reproductive productivity depending on amount flaxseed oil in feed additive. It was found that addition 10 20 g into additive which consists low-fat soy flour sugar syrup, demonstrates dose-dependent increase saturated, monounsaturated espec...

Copper is an essential micronutrient that is toxic in excess. To maintain an adequate yet non-toxic concentration of copper, cells possess several modes of control. One involves copper uptake mediated by genes encoding proteins that play key roles in high affinity copper transport. These include the FRE1-encoded Cu2+/Fe3+ reductase and the CTR1 and CTR3-encoded membrane-associated copper transp...