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The study was aimed at testing environmental-friendly plant essential oils for their protecting efficiency of valuable woods against colonization by mould and wood-decay fungi. Sixteen essential oils were applied to Fagus orientalis and Pinus taeda wood samples by vacuum impregnation and infected with Aspergillus niger, Penicillium commune (moulds), Coniophora puteana (brown rot), Trametes versicolor (white rot), Chaetomium globosum (soft rot) and natural infection by airborne spores. Lavender oil, lemon grass oil and thyme oil were the most effective oils against all fungi tested.

Oral health status of preschool children in Shiraz was less than optimal and had a significant impact on their OHRQoL. Therefore, improvement of children's OHRQoL could be achieved by improving their home dental care. Strategies promoting parental attitude about the importance of children's toothbrushing may significantly influence children's oral hygiene and are highly recommended.

If you would like to write for this, or any other Emerald publication, then please use our Emerald for Authors service information about how to choose which publication to write for and submission guidelines are available for all. Please visit www.emeraldinsight.com/authors for more information. About Emerald www.emeraldinsight.comEmerald is a global publisher linking research and practice to the benefit of society. The company manages a portfolio of more than 290 journals and over 2,350 books and book series volumes, as well as providing an extensive range of online products and additional customer resources and services.Emerald is both COUNTER 4 and TRANSFER compliant. The organization is a partner of the Committee on Publication Ethics (COPE) and also works with Portico and the LOCKSS initiative for digital archive preservation. AbstractPurpose -The Marshall-Lerner (M-L) condition, which stipulates that a devaluation or depreciation of its currency will improve a country's trade balance only if the sum of the absolute values of a country's import and export price elasticities are greater than one, is a fundamental tenet of international economics. The purpose of this study is to survey the literature that has tested the M-L condition, examining in particular whether previous studies' results are statistically significant. The authors then conduct their own estimation of 29 countries' trade elasticities, over the past few decades. Design/methodology/approach -While mostly a review paper, the paper also applies statistical techniques in two ways. First, the authors use t-tests on previously-published statistical results to see if the sums of their elasticities are significantly greater than one. The authors also apply the recently developed ARDL cointegration method, which has a number of attractive statistical properties, to estimate 29 countries' long-run import and export elasticities and test the M-L condition using recent data. Findings -The authors re-estimation using previous studies' coefficients and standard errors shows that, although the point estimates in many studies suggest that the M-L condition is met, it really is not met in half of the cases. This lack of evidence is confirmed with the authors' own empirical tests. Research limitations/implications -Not only does this paper collect the relevant literature in a way that will assist future researchers on the topic, these findings suggest that support for the M-L condition is much weaker that commonly thought. This therefore makes an important contribution to thinking regarding the potential benefits of devaluation, and to economic theory in general. Practical implications -Policymakers who hope to improve their countries' competitive position could benefit from learning that this policy is indeed less effective than might be supposed. This could lead to the implementation of more effective economic policies. Originality/value -As a literature review, the originality of this paper is that it collects relevant studies into one single paper. The sta...

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