Histological and immunohistochemical evaluation of the effect of tartrazine on the cerebellum,submandibular glands,and kidneys of adult male albino rats

Environmental Science and Pollution Research - Tartrazine is one of the most widely used food additives. The present investigation was carried out on 40 adult male albino rats. They were divided...     

Avoiding or embracing social relationships? A conservation of resources perspective of leader narcissism,leader–member exchange differentiation,and follower voice

In this study, we draw from the conservation of resources theory and the narcissism literature to examine why and when narcissistic leaders develop and maintain differentiated social relationships with followers in a group setting, therefore demotivating follower voice. Using data from 457 employees and their 95 supervisors working at a large Chinese consulting company, we tested and found support for our hypotheses that leader narcissism had a negative direct effect on employee voice, as well as a negative indirect effect on voice via group-level leader–member exchange (LMX) differentiation. Our findings further showed that leaders' upward exchange, leader–leader exchange (LLX), with their own supervisor moderated the negative indirect effect of narcissism on voice such that this negative indirect effect was stronger in the presence of low leader LLX but turned nonsignificant in the presence of high leader LLX. Theoretical and practical implications of our research are discussed. Limitations and directions for future research are also offered.     

Application of EMF emission measurement techniques to wireless communications systems for compliance with directive 2004/40/EC.

Europe is the only region in the world with common legislative acts regulating exposure to electromagnetic fields (EMF) for both the general public and workers. Council Recommendation 1999/519/EC deals with the limitation of exposure of the general public to EMF (0 Hz-300 GHz). Directive 2004/40/EC regulates the minimum health and safety requirements regarding the exposure of workers to the risks arising from EMF. This paper discusses the general application of existing standards and recommendations in measurement techniques for determining compliance of measured exposure limit values and action values with those defined in 2004/40/EC.     

Comparison of Two Parametric Methods to Estimate Pesticide Mass Loads in California’s Central Valley1

Saleh, Dina K., David L. Lorenz, and Joseph L. Domagalski, 2010. Comparison of Two Parametric Methods to Estimate Pesticide Mass Loads in California’s Central Valley. Journal of the American Water Resources Association (JAWRA) 00(0):1‐11. DOI: 10.1111/j.1752‐1688.2010.00506.x Abstract: Mass loadings were calculated for four pesticides in two watersheds with different land uses in the Central Valley, California, by using two parametric models: (1) the Seasonal Wave model (SeaWave), in which a pulse signal is used to describe the annual cycle of pesticide occurrence in a stream, and (2) the Sine Wave model, in which first‐order Fourier series sine and cosine terms are used to simulate seasonal mass loading patterns. The models were applied to data collected during water years 1997 through 2005. The pesticides modeled were carbaryl, diazinon, metolachlor, and molinate. Results from the two models show that the ability to capture seasonal variations in pesticide concentrations was affected by pesticide use patterns and the methods by which pesticides are transported to streams. Estimated seasonal loads compared well with results from previous studies for both models. Loads estimated by the two models did not differ significantly from each other, with the exceptions of carbaryl and molinate during the precipitation season, where loads were affected by application patterns and rainfall. However, in watersheds with variable and intermittent pesticide applications, the SeaWave model is more suitable for use on the basis of its robust capability of describing seasonal variation of pesticide concentrations.     

Reducing fall risk by improving balance control: development, evaluation and knowledge-translation of new approaches

Problem

Falling is a leading cause of serious injury, loss of independence, and nursing-home admission in older adults. Impaired balance control is a major contributing factor.

Methods

Results from our balance-control studies have been applied in the development of new and improved interventions and assessment tools. Initiatives to facilitate knowledge-translation of this work include setting up a new network of balance clinics, a research-user network and a research-user advisory board.

Results

Our findings support the efficacy of the developed balance-training methods, balance-enhancing footwear, neuro-prosthesis, walker design, handrail-cueing system, and handrail-design recommendations in improving specific aspects of balance control.

Impact on Knowledge Users

A new balance-assessment tool has been implemented in the first new balance clinic, a new balance-enhancing insole is available through pharmacies and other commercial outlets, and handrail design recommendations have been incorporated into 10 Canadian and American building codes. Work in progress is expected to have further impact.     

Valorization of quartz powder for drying shrinkage and carbonation resistance of alkali-activated slag cement

Environmental Science and Pollution Research - Alkali-activated slag (AAS) cement is one type of alkali-activated binders free from Portland cement. The main problems of this type of cement are its...     

Environmental risk,toxicity, and biodegradation of polyethylene: a review

Environmental Science and Pollution Research - Polyethylene is the second-most-commonly-used commercial polymer. It is used in various industries, including agricultural mulches, composite...     

Evaluation of Pediatric Early Warning System and Drooling Reluctance Oropharynx Others Leukocytosis scores as prognostic tools for pediatric caustic ingestion: a two-center,cross-sectional study

Environmental Science and Pollution Research - Caustic chemicals are widely distributed in our environment. Exposure to caustic agents is a lifelong problem associated with severe tissue and mucous...     

Hydrogen production from wastewater,storage, economy,governance and applications: a review

Environmental Chemistry Letters - In the context of climate change, most of the actual dihydrogen production is not sustainable with about 96% of the 60 million tons of dihydrogen produced annually...