Measurements of cloud condensation nuclei (CCN) were made in downtown Toronto during August and September, 2003. CCN measurements were performed at 0.58% supersaturation using a thermal-gradient diffusion chamber, whereas the aerosol size distribution and composition were simultaneously measured with a TSI SMPS and APS system and an Aerodyne Aerosol Mass Spectrometer (AMS), respectively. Aeroso...

Chitosan-graft-polyethylenimine (CHI-g-PEI) copolymer has been used for theimprovement of low transfection efficiency of chitosan. The present study aims to test thepulmonary toxicity and efficiency of CHI-g-PEI as an aerosol gene carrier. Mice were exposedto aerosol containing green-fluorescent protein (GFP)-polyethylenimine (PEI) or GFP-CHIg-PEI complexes for 30 min during the development of ...

High numbers of mycobacteria, including known pathogenic species such as Mycobacterium avium, Mycobacterium intracellulare, and Mycobacterium chelonae, were recovered from aerosols produced by pouring commercial potting soil products and potting soil samples provided by patients with pulmonary mycobacterial infections. The dominant mycobacteria in the soil samples corresponded to the dominant s...

First we would like to thank Reviewer 3 for his/her supportive review. Indeed, previous dry approaches for aerosol optical properties have not worked properly. Historically, the transport of sea salt is based on two dry size modes with effective radius 0.731 and 6.13 μm. Today, most research groups have the ability to handle a continuous wet size spectrum (http://nansen.ipsl.jussieu.fr/AEROCOM/...

Tropospheric aerosol size distributions are simulated by three online global models which employ exactly the same aerosol microphysics module, but differ in many aspects such as model meteorology, natural aerosol emission, sulfur chemistry, and deposition processes. The main purpose of this study is to identify the influence of these differences on the aerosol simulation. Number concentrations ...

The analysis revisits the calculation of empirical orthogonal functions (EOFs) and principal components (PCs) sea surface temperature (SST) in North Pacific from 1950 to 2021. first EOF PC SST has proven be such a useful metric variability that it is called Decadal Oscillation (PDO). We find period persistent marine heatwaves beginning 2014 caused fundamental change (calculated using data 2021)...

This thesis presented analysis and results from long-term and short-term aerosol particle measurements of indoor-outdoor total particle number and size distributions in Helsinki. This thesis focused on the temporal–spatial variations of aerosol particle number size distributions, the factors (including local wind, ambient temperature, and traffic density) influencing the particle number size di...

background: bio aerosols include airborne micro-organisms such as bacteria, fungi, viruses, etc and their products. exposure to a bio aerosol is linked with a broad spectrum of health problems, including infectious diseases, acute toxic effects, allergies, and cancer. the aim of this study was to evaluate the quality and quantity of bio aerosols found in the air of different wards in valiasr ho...