A methodology for estimating indoor sources contributing to PM.

Quantifying source contributions to indoor PM levels by indoor PM sources has been limited by the costs associated with chemical speciation analyses of indoor PM samples. Here, we propose a new methodology to estimate this contribution. We applied FUzzy SpatioTemporal Apportionment (FUSTA) to a database of indoor and outdoor PM concentrations in school classrooms plus surface meteorological data to determine the main spatiotemporal patterns (STPs) of PM.

Local and NON-LOCAL source apportionment of black carbon and combustion generated PM.

Current methods for measuring black carbon aerosol (BC) by optical methods apportion BC to fossil fuel and wood combustion. However, these results are aggregated: local and non-local combustion sources are lumped together. The spatial apportioning of carbonaceous aerosol sources is challenging in remote or suburban areas because non-local sources may be significant.

Spatiotemporal Analysis of Black Carbon Sources: Case of Santiago, Chile, under SARS-CoV-2 Lockdowns.

Background: The SARS-CoV-2 pandemic has temporarily decreased black carbon emissions worldwide. The use of multi-wavelength aethalometers provides a quantitative apportionment of black carbon (BC) from fossil fuels (BC) and wood-burning sources (BC). However, this apportionment is aggregated: local and non-local BC sources are lumped together in the aethalometer results.

A new methodology for source apportionment of gaseous industrial emissions.

Air quality modeling (AQM) is often used to investigate gaseous pollution around industrial zones. However, this methodology requires accurate emission inventories, unbiased AQM algorithms and realistic boundary conditions. We introduce a new methodology for source apportionment of industrial gaseous emissions, which is based on a fuzzy clustering of ambient concentrations, along with a standard AQM approach.

Combining Cluster Analysis of Air Pollution and Meteorological Data with Receptor Model Results for Ambient PM and PM.

Air pollution regulation requires knowing major sources on any given zone, setting specific controls, and assessing how health risks evolve in response to those controls. Receptor models (RM) can identify major sources: transport, industry, residential, etc. However, RM results are typically available for short term periods, and there is a paucity of RM results for developing countries.

Root Coverage of Multiple Miller Class I and II Recession Defects Using Acellular Dermal Matrix and Tunneling Technique in Maxilla and Mandible: A 1-Year Report.

The objective of the present report was to study the influence of the location (maxilla versus mandible) and class (Miller classification) of gingival recessions on the total root coverage achievement using the tunnel procedure with acellular dermal matrix in adjacent single-root teeth. Twenty-four patients with 93 recessions were treated and evaluated 1 year postsurgery. Results showed 100% of root covered in 67.

[Periodontal disease among patients with acute coronary syndrome].

Background: Epidemiological studies suggest an association between periodontal disease and coronary heart disease. It is possible that periodontal disease may contribute to plaque destabilization in patients with acute coronary syndrome.

Aim: To assess the association between severity of periodontal disease, the number of acute plaques and extension of coronary artery disease in patients with acute coronary syndrome.