## 3 Results
\begin{table}
\begin{tabular}{|c|c|c|} \hline
**Week One** & **Week Two** & **Week Three** \\ \hline
1-H-2-Benzopyran-1-one & 1,4,7,10,13,16,19-Heptaxa-2-cydobeneicosanone & 1,2,4-methe no azulene \\ \hline
1H-2-Benzopyran-1-one & 1,4-methe no azulene \\ \hline
1-hexanol & 1H-2-Benzopyranan-1-one \\ \hline
1-nonadecene & 1-hexadecene \\ \hline Benzene & 1-hexanol \\ \hline Cyclododecane & 1-Propene \\ \hline Cyclodane & 3-care \\ \hline Heptadecane & 3-tetradecene \\ \hline Hexadecane & Benzene \\ \hline n-butyl laurate & Cyclododecane \\ \hline Oleyl alcohol & Cyclotetadecane \\ \hline Odirane & Dodecane \\ \hline Phenol & Heptadecane \\ \hline Hexadecane \\ \hline Hexanediol \\ \hline Naphthalene & \\ \hline n-NonlyCyclohexane \\ \hline Octadec-02-enol \\ \hline Odirane & \\ \hline Pentadecane \\ \hline Pentadecane \\ \hline Phenol \\ \hline Sbrene & Tetadecan \\ \hline Tridecane \\ \hline Undecane \\ \hline \end{tabular}
\end{table} 
Table 4: The Effect of Time on MVOC composition of _Stachybotrys chartarum_  
**Table 6**. Results from canine field tests on May 5, 2005 in terms of individual canines' performances. Numbers in the positive control column denote which positive controls were detected by each canine; numbers in the false positives and misses columns denote the number of false positives and misses for each canine as well as the hide numbers that elicited each response. \begin{tabular}{|l|l|l|l|l|} \hline
**Canine** & **Positive controls** & **Percentage of positive controls** & **False positives** & **Misses** \\ \hline
5 & 2,3 & 66.7\% & **0** & **1:** 1 \\ \hline
6 & 1,2,3 & 100\% & **0** & **0** \\ \hline
7 & 1 & 33.3\% & **0** & **2:** 2,3 \\ \hline
8 & 1,2,3 & 100\% & **0** & **0** \\ \hline \end{tabular}   
**4. Conclusions**  
These experiments show that canines can effectively detect active odor components of various indoor mold species. By using SPME-GC/MS analysis, detection of the MVOCs emitted from three toxic indoor models, _Penicillium chrysogenum_, _Aspergillus versicolor_, and _Stachybtorys chartarum_ was established. The distinctiveness of volatile secondary metabolite production of these species could be estimated by this technique as well. This mold detection research is important, as canine trainers can use the compounds isolated found in this study to ensure the canines are being trained on the correct odors being emitted from these toxic molds. Some microbial volatile organic compounds were common amongst the three species. 1-hexanol, hexanoic acid, and benzene were extracted from the headspaces of all three species analyzed. Arsenous acid, dodecanoic acid, tetradecanoic acid, n-butyl laurate and 1,4,7,10,13,16,19-heptaoxa-2-cyclohexeneicosanone were extracted from the headspaces of both _Aspergillus versicolor_ and _Penicillium chrysogenum_. Oxirane was extracted from the headspaces of both _Penicillium chrysogenum_ and _Stachybtorys chartarum_. Even amongst these commonly seen compounds, there is a great difference in the percent peak areas detected between these three species. Knowledge of the similarities and differences of the odor signatures of various toxic indoor mold species is very significant and useful in the improvement of existing canine training aids. Figure 6 below illustrates the differences in the percent peak areas of these common compounds. The detection of changes in MVOCs composition from the headspace of a toxic mold species over time is a significant finding. If the odor signatures of the molds change significantly over time, training methods may need to be modified to account for changes in composition. The results from the experiments of the effect of time on the _Stachybtorys chartarum_ MVOC composition are conclusive. One compound, 1-H-2-Benzopyran-1-one, remained in the headspace for the three successive weeks. Seven compounds remained in the headspace for the second and third weeks of the experiments: 1-H-2-Benzopyran-1-one, 1-hexanol, benzene, cyclodotecane, heptadecane, oxirane, and phenol.