## 3 Results
### Evaluation of the Release of Phosphorus in an Aqueous Medium  
The release of phosphorus from oleogels was evaluated in a model composed of an aqueous medium that simulated rumen conditions (i.e., temperature, pH and stirring). Starting with an initial phosphorus concentration of 226.7 mg/L, the phosphorus concentration released within the model systems was measured every 12 h. The results are shown in Figure 4, where it can be seen that the accumulated amount of phosphorus released by all the oleogels studied increased as a function of time. The oleogel with 10% CW had a total percentage of phosphorus release of 39.5% (\(\sim\)89.5 mg), that of 15% CW had a phosphorus release of 76.1% (\(\sim\)172.5 mg), and that of 20% CW showed a phosphorus release of 83.3% (\(\sim\)188.8 mg). Thus, in the present work, it could be deduced that both the type of molecular self-assembly formed by the CW as well as the diffusion coefficient of the molecules present in the liquid phase and also of the medium in which they were deposited (i.e., the aqueous solution of the model system) had an effect on the effective  
\begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline  & & & & & & & & \\ \hline  & **0 h** & **12 h** & **24 h** & **36 h** & **60 h** & **72 h** & **84 h** \\ \hline
10\% CW & 0 \(\pm\) 0.00 \({}^{\rm Aa}\) & 2.82 \(\pm\) 0.10 \({}^{\rm Ba}\) & 2.92 \(\pm\) 0.04 \({}^{\rm Ba}\) & 3.08 \(\pm\) 0.05\({}^{\rm Ca}\) & 3.27 \(\pm\) 0.17 \({}^{\rm Ca}\) & 4.56 \(\pm\) 0.09 \({}^{\rm DB}\) & 5.72 \(\pm\) 0.08 \({}^{\rm Ba}\) & 6.76 \(\pm\) 0.08 \({}^{\rm Ba}\) \\
15\% CW & 0 \(\pm\) 0.00 \({}^{\rm Aa}\) & 2.76 \(\pm\) 0.15 \({}^{\rm Ba}\) & 3.09 \(\pm\) 0.12 \({}^{\rm Ba}\) & 3.33 \(\pm\) 0.06 \({}^{\rm Ca}\) & 3.40 \(\pm\) 0.06 \({}^{\rm Ca}\) & 4.69 \(\pm\) 0.04 \({}^{\rm DB}\) & 5.80 \(\pm\) 0.20 \({}^{\rm Ba}\) & 6.93 \(\pm\) 0.11 \({}^{\rm Ba}\) \\
20\% CW & 0 \(\pm\) 0.00 \({}^{\rm Aa}\) & 3.28 \(\pm\) 0.15 \({}^{\rm Ba}\) & 5.37 \(\pm\) 0.31 \({}^{\rm Ca}\) & 5.94 \(\pm\) 0.06 \({}^{\rm Ba}\) & 6.75 \(\pm\) 0.11 \({}^{\rm Ca}\) & 6.77 \(\pm\) 0.14 \({}^{\rm Ca}\) & 8.79 \(\pm\) 0.04 \({}^{\rm Fe}\) & 10.87 \(\pm\) 0.3 \({}^{\rm Ca}\) \\
10\% CW + P\({}^{+}\) & 0 \(\pm\) 0.00 \({}^{\rm Aa}\) & 2.80 \(\pm\) 0.26 \({}^{\rm Ba}\) & 2.95 \(\pm\) 0.09 \({}^{\rm Ba}\) & 3.19 \(\pm\) 0.04 \({}^{\rm Ca}\) & 3.20 \(\pm\) 0.04 \({}^{\rm Ca}\) & 4.28 \(\pm\) 0.15 \({}^{\rm Ca}\) & 4.48 \(\pm\) 0.14 \({}^{\rm Ca}\) & 6.66 \(\pm\)  
release of phosphorus. In addition, as mentioned in Section 3.2, another factor that could have influenced the release of the liquid phase in these systems is related to solid-solid transitions caused by a molecular rearrangement as a function of time and also with the pore size of the network of CW molecules. With these results, it is demonstrated that the developed oleogels released phosphorus slowly in the medium. Therefore, if these systems were used as feed boluses, they could guarantee a supply of phosphorus to the animals for up to 4 days, thereby meeting the requirements of this mineral in grazing goats [10]. As the release is slow, the dosage of the oleogel to the animals could be spaced out, avoiding stress due to frequent encounters and also lowering labor costs. In the present work, the release of phosphorus in ruminal fluid extracted from the digestive system of a recently slaughtered goat was also evaluated, which replaced the aqueous medium in the model system used previously.