Comparison between Tanaka-Johnston and Boston University Approach for Prediction of Mesiodistal Width of Canines and Premolars in Mixed Dentition Children: A Cross-sectional Study.

Introduction: Malocclusion, a common dental issue in children, necessitates early intervention to mitigate future orthodontic challenges. Predictive methodologies like Tanaka and Johnston analysis (TJA) and Boston University approach (BUA) aid in mixed and primary dentition analysis for optimal treatment planning. This study aimed to compare TJA and BUA in predicting the mesiodistal width of unerupted permanent canines and premolars and assess gender-based variations.

Evaluating the effectiveness of low-sulphur marine fuel regulations at improving urban ambient PM air quality: Source apportionment of PM at Canadian Atlantic and Pacific coast cities with implementation of the North American Emissions Control Area.

Ambient fine size fraction particulate matter (PM) sources were resolved by positive matrix factorization at two Canadian cities on the Atlantic and Pacific coast over the 2010-2016 period, corresponding to implementation of the North American Emissions Control Area (NA ECA) low-sulphur marine fuel regulations. Source types contributing to local PM concentrations were: ECA regulation-related (residual oil, anthropogenic sulphate), urban transportation and residential (gasoline, diesel, secondary nitrate, biomass burning, road dust/soil), industry (refinery, Pb-enriched), and largely natural (biogenic sulphate, sea salt). Anthropogenic sources accounted for approximately 80 % of PM mass over 2010-2016.

Efficacy of Precocene I from as an Effective Bioactive Molecules against the Fab. and Its Impact on Savigny.

The sustainability of agroecosystems are maintained with agro-chemicals. However, after more than 80 years of intensive use, many pests and pathogens have developed resistance to the currently used chemistries. Thus, we explored the isolation and bioactivity of a chemical compound, Precocene I, isolated from the perennial grass, (L.

Air quality in Canadian port cities after regulation of low-sulphur marine fuel in the North American Emissions Control Area.

Large marine vessels have historically used high-sulphur (S) residual fuel oil (RFO), with substantial airborne releases of sulphur dioxide (SO₂) and fine particulate matter (PM) enriched in vanadium (V), nickel (Ni) and other air pollutants. To address marine shipping air pollution, Canada and the United States have jointly implemented a North American Emissions Control Area (NA ECA) within which ships are regulated to use lower-sulphur marine fuel or equivalent SO scrubbers (i.e.

Self-Assembly and sedimentation of 5 nm SPIONs using horizontal, high magnetic fields and gradients.

Superparamagnetic iron oxide nanoparticles (SPIONs) are employed in multiple applications, especially within medical and chemical engineering fields. However, their magnetic separation is very challenging as the magnetophoretic motion is hindered by thermal energy and viscous drag. Recent studies have addressed the recovery of SPIONs by a combination of cooperative magnetophoresis and sedimentation.