[ role of coping styles and self-efficacy in nurses job stress in hospital]

Introduction: Job stress is one of the challenges of nurse's profession. The purpose of this study was to examine the role of coping styles and self-efficacy on job stress in hospital nurses

Methods: Current study was a descriptive study. In this study, a statistical sample comprised of 171 nurses from the Isfahan city hospitals were selected with multistage cluster sampling Method and completed the Coping Style, General Self-efficacy and job stress Questionnaire. Data were analyzed using Pearson correlation and stepwise regression

Results: The results showed that there was a negative correlation respectively [r=-0/41, M=46/30], [r=-0/32, M =30/47] between self-efficacy and problem oriented coping style with hospital job stress and significance level was p

Conclusion: According to current study findings, there is a significant relationship between self-efficacy and problem oriented coping style with hospital job stress. Therefore, it is emphasized on Training problem oriented coping styles and self-efficacy enhancement in order to minimize occupational stress and improve working processes. In addition to, it ventured toward to elimination problems conducive to occupational stress and developed a soothing mental climate in workplace. The results of this research can help to hospital administrators in reduce job stress in hospital nurses and them efficiency increase

[Evaluation of monomer elution from two dentin bonding agents cured with halogen and LED lights]

Polymerization of resin-based dental materials is not complete; and the release of unreacted monomers has undesirable effects on biocompatibility and integrity of material. The aim of this study was to evaluate the type and effect of dentin bonding agents, type of light curing unit, the distance between the tip of curing unit and surface of bonding agents on monomer leaching. This experimental study used 40 sound extracted teeth, with prepared cavities about 3x3x2 and 3x3x4 mm on the smooth surfaces. A self-etch bonding [Clearfil SE Bond Curary, Japan] and one etch and rinse [Scotch Bond multipurpose, USA] were applied on cavities according to the manufacturer's instruction. The bonding agents were cured with halogen [Optilux 501, Colten] and LED [Ultalume 2, Vivadent] lights. The samples were saved in pure methanol with 37°C for 24h. Liquids were studied with gas chromatography [GC] for detection of different monomers. Data were analyzed using 3-Way ANOVA and Independent T-tests. The type of bonding agent had significant effect on monomer release. Scotch Bond released more monomer than Clearfil SE Bond [P=0.001]. The effect of light curing unit on monomer leaching was not significant, but the samples of Scotch Bond with more distance released more monomer. Only HEMA monomer was detected from dentin bonding agents in this study. Scotch Bond released more HEMA than Clearfil SE Bond. Halogen and LED lights had no significant effect on monomer leaching. More distance between the tips of light causes less degree of polymerization

Biological indicators of air quality in Brisbane, Australia

During very considerable progress in industry and industrial centres development in late 20[th] and early 21[st] century, air pollution has become one of the most significant problems of mega cities. Thus, air pollution survey to exert abatement methods has a very important role. Various methods are available for air pollution monitoring which are very costly. Air pollution monitoring by susceptible plants as biological indicators are not only economic but also simple. In this paper, vast studies were done on the plants of around each Queensland Environmental Protection Agency [QEPA] monitoring sites. Around these sites susceptible plants to air pollution were neither available nor exist in all monitoring sites. Therefore, it seemed the best method is the portable exposure benches application with automatic watering system in five sites among all studied locations. In this research different varieties of tobacco like Weather fleck, Bel-B, Bel-W3, Dynes, ZZ100 were used to measure the impact of ozone as a pollutant on them. Parsley cv. Frizz and Leek cv. Vertina were selected as nitogen oxides indicators. In general, the above-mentioned plants were exposed to the ambient air in five sites around Brisbane from April 1997 to May 1998. The susceptible variety leaves of Bel-W3 showed injuries just in two sites. The reason for this is the high level of ozone and the effects of climatic factors in production and dispersion of it during the experiments. The survey results represent that ozone with elevated concentrations is available as far as 30km radius from Brisbane city centre. Within this area only the most susceptible plants` leaves would be liable to suffer injury

Assessment of ozone effects on five varieties of tobacco via fumigation method

To assess the susceptibility of five varieties of tobacco to ozone, nine rounds of fumigation experiments were performed. These tobacco varieties were exposed to a range of ozone concentrations in a single-pass chamber fumigation system for short periods. A dose of 7.5 pphm did not produce visible injury in any tobacco variety. Tobacco cultivars; Bel-B, Weather Fleck and ZZ100 exhibited no visible injury up to 26 pphm. However, doses in excess of 16 pphm caused visible injury in cultivars Bel-W3 and Dynes. Awareness of the susceptibility levels of these cultivars to ozone assist biological monitoring process in field experiments. Biomonitoring is considered to be a valuable method for ozone assessment for situations where air pollution monitoring by instruments in remote locations is too expensive