scholarly journals Spatial patterns in 87Sr/86Sr ratios in modern human dental enamel and tap water from the Netherlands: Implications for forensic provenancing

2020 ◽  
Vol 729 ◽  
pp. 138992 ◽  
Author(s):  
Lisette M. Kootker ◽  
Esther Plomp ◽  
Saskia T.M. Ammer ◽  
Vera Hoogland ◽  
Gareth R. Davies
2020 ◽  
Vol 172 (4) ◽  
pp. 586-604 ◽  
Author(s):  
Esther Plomp ◽  
Isabella C. C. Holstein ◽  
Lisette M. Kootker ◽  
Suzanne J. A. Verdegaal‐Warmerdam ◽  
Tim Forouzanfar ◽  
...  

2007 ◽  
Vol 31 (3) ◽  
pp. 153-159 ◽  
Author(s):  
Michael Kitchens ◽  
Barry Owens

Purpose: This study evaluated the effect of carbonated and non-carbonated beverages, bottled and tap water, on the erosive potential of dental enamel with and without fluoride varnish protection. Materials and Methods: Beverages used in this study included: Coca Cola Classic, Diet Coke, Gatorade sports drink, Red Bull high-energy drink, Starbucks Frappuccino coffee drink, Dasani water (bottled), and tap water (control). Enamel surfaces were coated with Cavity Shield 5% sodium fluoride treatment varnish. Twenty-eight previously extracted human posterior teeth free of hypocalcification and caries were used in this study. The coronal portion of each tooth was removed and then sectioned transverse from the buccal to lingual surface using a diamond coated saw blade. The crown sections were embedded in acrylic resin blocks leaving the enamel surfaces exposed. The enamel surfaces were polished using 600 to 2000 grit abrasive paper and diamond paste. Test specimens were randomly distributed to seven beverage groups and comprised 4 specimens per group. Two specimens per beverage group were treated with a fluoride varnish while 2 specimens did not receive fluoride coating. Surface roughness (profilometer) readings were performed at baseline (prior to fluoride treatment and immersion in the beverage) and again, following immersion for 14 days (24 hours/day). The test beverages were changed daily and the enamel specimens were immersed at 37° C. Surface roughness data was evaluated using multiple factor ANOVA at a significance level of p<0.05. Results: Results showed that Coca-Cola Classic, Gatorade and Red Bull with/without fluoride revealed the highest post-treatment surface roughness measurements. Coca-Cola Classic, Diet Coke, Gatorade, and Red Bull all showed significantly higher post treatment readings than StarBucks coffee, Dasani water, and tap water. Fluoride varnish was not a significant impact factor; however, beverage (type) and exposure time were significant impact variables. Conclusion: Both carbonated and non-carbonated beverages displayed a significant erosive effect on dental enamel; however, fluoride varnish treatments did not demonstrate a significant protective influence on enamel surfaces.


PLoS ONE ◽  
2021 ◽  
Vol 16 (10) ◽  
pp. e0259233
Author(s):  
Stijn Brouwer ◽  
Nicolien van Aalderen ◽  
Steven Hendrik Andreas Koop

Despite the often emphasized importance of water awareness, and notwithstanding the fact that calls for increasing public awareness are becoming commonplace, most studies do not define the concept, let alone operationalise it into measurable units. This is, however, essential to measure and evaluate efforts related to water awareness such as public campaigns, customer communication and behavioural interventions. To address this gap, we conceptualise, operationalise and assess tap water awareness, hereby differentiating between cognitive awareness (head), affectional awareness (heart), and behavioural awareness (hands). In parallel, we also differentiate between tap water quality, quantity and system. By building on a variety of contemporary conceptual insights in literature and a series of expert interviews, an assessment framework is developed. A cohesive set of nine awareness components are identified and operationalised into a set of tangible questions which are put to the test in a large-scale online survey (n = 1003) in the Netherlands, applying both a traditional and modern segmentation approach based on four types of perspectives (‘quality & health concerned’, ‘aware & committed’, ‘egalitarian & solidary’, and ‘down to earth & confident’). Based on the analysis of the results of the first empirical application of our tap water awareness assessment framework, we conclude that—with a score 53.5 points out of 100—tap water awareness in the Netherlands shows ample room for improvement. Interestingly, most significant variations in awareness are generally not related to sociodemographic factors but rather apply to the four customer perspectives on drinking water that are based on people’s subjective views and preferences.


2014 ◽  
Vol 10 (10) ◽  
pp. 20140484 ◽  
Author(s):  
Charles Ziscovici ◽  
Peter W. Lucas ◽  
Paul J. Constantino ◽  
Timothy G. Bromage ◽  
Adam van Casteren

Dental enamel is prone to damage by chipping with large hard objects at forces that depend on chip size and enamel toughness. Experiments on modern human teeth have suggested that some ante-mortem chips on fossil hominin enamel were produced by bite forces near physiological maxima. Here, we show that equivalent chips in sea otter enamel require even higher forces than human enamel. Increased fracture resistance correlates with more intense enamel prism decussation, often seen also in some fossil hominins. It is possible therefore that enamel chips in such hominins may have formed at even greater forces than currently envisaged.


1999 ◽  
Vol 31 (1) ◽  
pp. 9-20 ◽  
Author(s):  
C. M. van Herk

AbstractIn the Netherlands a monitoring programme is in operation to map the effects of ammonia pollution with epiphytic lichens. The method is presented here and the results are statistically correlated with abiotic data. The abundance of nitrophytes on Quercus robur appears to be a useful parameter. Detailed spatial patterns of ammonia pollution can be obtained with lichens. To avoid interference, it is important to consider other influences, for example dust, climate, exposure, age of the trees and other pollutants.


2010 ◽  
Vol 118 (3) ◽  
pp. 414-420 ◽  
Author(s):  
Lina J. Leurs ◽  
Leo J. Schouten ◽  
Margreet N. Mons ◽  
R. Alexandra Goldbohm ◽  
Piet A. van den Brandt

2008 ◽  
Vol 76 (2) ◽  
pp. 357-368 ◽  
Author(s):  
Daphne Van der Wal ◽  
Annette Wielemaker-Van den Dool ◽  
Peter M.J. Herman

Water ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2608
Author(s):  
Stijn Brouwer ◽  
Roberta Hofman-Caris ◽  
Nicolien van Aalderen

In the context of an increasing societal demand for transparency in parallel with rapidly increasing numbers and concentrations of substances found in drinking water, this paper investigates how different drinking water customers perceive their tap water quality, and possible risks involved. Empirically, the paper draws on results from a representative survey, a series of interviews and focus groups conducted in the Netherlands, applying both a traditional and modern segmentation approach based on four types of perspectives (“aware and committed”, “down to earth and confident”, “egalitarian and solidary”, and “quality and health concerned”). Although in general it was found that people’s trust in tap water is high, certain groups are more concerned about water quality and health effects than others. It was shown that transparency and the availability of more information about water treatment and quality would contribute to increasing customer trust. It was also observed that, at least in the Netherlands, people have a larger trust in drinking water companies than in other institutions. Therefore, instead of referring to standards made by other institutions, it is recommended that water companies themselves provide information on water quality and emphasize their treatment procedures.


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