Enthalpies of dilution of aqueous tetradecyltrimethylammonium bromide from 50 to 175�C

1987 ◽  
Vol 16 (5) ◽  
pp. 347-365 ◽  
Author(s):  
Donald G. Archer
Keyword(s):  
Tetradecyltrimethylammonium Bromide ◽  
Enthalpies Of Dilution

Corrigendum to “The enthalpies of dilution of some dipeptides in water at 298.15 K” [J. Chem. Thermodyn. 154 (2021) 106338]

2021 ◽  
Vol 157 ◽  
pp. 106410
Author(s):  
Sylwia Belica-Pacha ◽  
Martyna Michalska-Tężycka ◽  
Magdalena Ciechańska ◽  
Artur Stępniak ◽  
Bartłomiej Pałecz
Keyword(s):  
Enthalpies Of Dilution

scholarly journals Recovery of Mycobacteria from Heavily Contaminated Environmental Matrices

2021 ◽  
Vol 9 (10) ◽  
pp. 2178
Author(s):  
Vit Ulmann ◽  
Helena Modrá ◽  
Vladimir Babak ◽  
Ross Tim Weston ◽  
Ivo Pavlik
Keyword(s):  
Dna Isolation ◽  
Animal Origin ◽  
Quantitative Detection ◽  
Contamination Rate ◽  
Propidium Monoazide ◽  
Environmental Matrices ◽  
Tetradecyltrimethylammonium Bromide ◽  
Faecal Samples ◽  
Universal Procedure ◽  
Epidemiology Studies

For epidemiology studies, a decontamination method using a solution containing 4.0% NaOH and 0.5% tetradecyltrimethylammonium bromide (TDAB) represents a relatively simple and universal procedure for processing heavily microbially contaminated matrices together with increase of mycobacteria yield and elimination of gross contamination. A contamination rate only averaging 7.3% (2.4% in Cluster S; 6.9%% in Cluster R and 12.6%% in Cluster E) was found in 787 examined environmental samples. Mycobacteria were cultured from 28.5% of 274 soil and water sediments samples (Cluster S), 60.2% of 251 samples of raw and processed peat and other horticultural substrates (Cluster R), and 29.4% of 262 faecal samples along with other samples of animal origin (Cluster E). A total of 38 species of slow and rapidly growing mycobacteria were isolated. M. avium ssp. hominissuis, M. fortuitum, and M. malmoense were the species most often isolated. The parameters for the quantitative detection of mycobacteria by PCR can be significantly refined by treating the sample suspension before DNA isolation with PMA (propidium monoazide) solution. This effectively eliminates DNA residue from both dead mycobacterial cells and potentially interfering DNA segments present from other microbial flora. In terms of human exposure risk assessment, the potential exposure to live non-tuberculous mycobacteria can be more accurately determined.

Sign in / Sign up

Export Citation Format

Share Document