Nicholls State University

About: Nicholls State University is a education organization based out in Thibodaux, Louisiana, United States. It is known for research contribution in the topics: Population & The Internet. The organization has 456 authors who have published 795 publications receiving 20031 citations.

24 Occupational Health Psychology

Abstract: Occupational health psychology (OHP) has emerged as a growing branch of psychology interested in promoting individual and organizational health and well-being. As the interest and concern over how work affects the health and well-being of workers has increased over the years, the need to address this in our research and practice has grown as well. This chapter overviews what is meant by occupational health and provides a composite of work that is currently being done in the field. The first section of the chapter provides a brief history of OHP. The next section discusses three key ecological dimensions as the basis for action in improving occupational health. The third section provides a framework for preventive health management, and the fourth section presents an organizational health center model, followed by an OHP training model. The chapter concludes with a case study demonstrating key concepts from the chapter and a discussion of future directions for the discipline. Keywords: occupational health; employee well-being; occupational stress; work safety

Breaking the Mississippi River Barrier: Range Extensions of Faxonius palmeri Subspecies and Overlap with Rare Crayfish Species in Louisiana

Abstract: Abstract Stream community surveys from 2008 to 2015 in the central Louisiana river basins (Red, Calcasieu, Vermillion-Teche, Mermentau, Ouachita, and Atchafalaya rivers) have resulted in new distributional data for 2 subspecies of Faxonius palmeri (Lowland Painted Crayfish). We also report unidentified Faxonius specimens appearing in streams of the northern Calcasieu River basin as well as a stream crossing the Mermentau-Calcaiseu River basin boundary, which warrant further investigation as to their identity. We determined that F. palmeri cannot be assumed to be separated along basin and river boundaries, and that the Mississippi River is probably not a biogeographic barrier for F. p. palmeri. We believe further species overlaps caused by range expansions of F. palmeri subspecies with endemic species of state conservation interest are likely.

Spray-coated high-efficiency small molecule solar cell based on DTS[PTTH 2 ] 2 : PC 71 BM configurations through integrated molecular and solvent engineering

Abstract: Electronic devices comprising bonded organic compounds are getting advanced at a tremendous speed as a result of their distinguished electrical behaviour and photonics tendency along with simple processing conditions. In this regard, here we report on the fabrication of an efficient solution-processed small molecule solar cells based on the combination of DTS[PTTH2]2 as a donor and PC71BM as an acceptor. The active layer configurations were framed through solvent engineering concepts implementing a blend of different additive concentrations through the spray-coating technique. The optical absorption phenomenon was investigated through the UV–visible spectrum for the wavelength sweep ranging from 300 to 900 nm. Studies related to the surface pattern, phase separation and morphology were carried out through Scanning electron microscopy and Atomic force microscopy. JV values were analysed through solar simulator under illumination mode. IPCE analysis and ageing studies were performed for better device analysis. The efficiency of about 8.16% is achieved for the particular active layer configuration holding 0.3% DIO additive with improved stability and photovoltaic parameters. These results provoke the progression of organic solar cells and also explain that the cells fabricated through small molecule-based donors using the spray-coating method can contend readily with the polymeric counterparts.

Thermal stress responses of two sympatric crayfishes in Louisiana, Procambarus clarkii Girard, 1852 and Procambarus zonangulus Hobbs & Hobbs, 1990 (Decapoda: Astacoidea: Cambaridae)

Abstract: Water temperature is an important abiotic component in farmed and wild crayfish habitats as it influences individual and population characteristics including growth, metabolic activity, and overall population vigor. Thermal limits, however, have not been established for the two commercially important crayfishes in Louisiana, the red swamp crayfish Procambarus clarkii (Girard, 1852) and the southern white river crayfish P. zonangulus (Hobbs & Hobbs, 1990). We aimed to determine the thermal stress responses for the two species. Thermal stress was examined by the critical thermal maxima (CTmax) for crayfish acclimated to 24, 27, or 30 °C for two weeks prior to experimentation. Water temperature in all acclimation trials was increased 1 °C h–1 and the end-point temperature for an individual was determined by the failure of righting response within 30 seconds. CTmax values (±SD) for P. clarkii acclimated at 24, 27, and 30 °C were 39.5 ± 0.5, 39.1 ± 0.3, and 39.4 ± 0.7 °C respectively, and 39.8 ± 0.8, 38.8 ± 0.8, and 39.0 ± 0.6 °C for P. zonangulus. CTmax did not differ significantly between species in any of the acclimation treatments. Thermal stress was also examined by measuring P. clarkii and P. zonangulus hemolymph glucose concentration every two hours for crayfish acclimated at 26 °C for two weeks and water temperature increased 1 °C h–1. Hemolymph glucose concentration began to increase at 36 °C in P. zonangulus and 38 °C in P. clarkii. Large increases in mean hemolymph glucose concentration (±SE) were observed in both P. clarkii (67.19 mg–dl ± 24.55) and P. zonangulus (74.11 mg–dl ± 18.04) at 40 °C.