In this study, drying fractionation beef tallow was obtained, and then the beef tallow was analyzed by headspace gas chromatographyion mobility spectrometry (GC-IMS). The experimental results showed that with the decrease in fractionation temperature, the content of saturated fatty acids displayed a decreasing trend, while the content of unsaturated fatty acids displayed an increasing trend. The results of determination of peroxide value, acid value and iodine value showed that the acid value of the components increased with the decrease of the fractionation temperature. A total number of 63 volatile compounds were detected through (GC-IMS), and qualitative and quantitative analyses were performed in order to determine the contents of volatile compounds in samples. The results also indicated that esters, aldehydes, ketones, and alcohols of macromolecular volatile components mainly appear in the MP 30 , MP 40 , and MP 40+ components, while the volatile components of MP 24 are mainly small molecules of esters, alcohols, aldehydes, and ketones. Indeed, in this study, ion migration chromatography fingerprint library of the characteristic components of beef tallow was also constructed, and the generated (GC-IMS) two-dimensional spectrum was used to analyze the difference characteristics of beef tallow, which provides theoretical guidance for the physical and chemical properties of beef tallow.
In our previous work, (S)‐6H‐1‐(5‐isoquinolinesulfonyl)‐2‐hydroxymethyl‐1‐pyrrolidine and (S)‐6H‐1‐(5‐isoquinolinesulfonyl)‐2‐chloromethyl‐1‐pyrrolidine displayed potent inhibitory activity. Therefore, with these two substances as lead compounds, we designed and synthesized their enantiomers to reveal the inhibitory effects of chirality on Rho kinase. It is found that their enantiomers exhibited much better Rho kinase inhibitory activity and strongly promoted synapse formation. Experimental autoimmune encephalomyelitis is a murine autoimmune disease used to study multiple sclerosis. With added antigens, the changes from C57BL/6 mice's limbs and tail was observed and scored by clinical evaluation. The synthetic compounds may simultaneously reduce symptoms of experimental autoimmune encephalomyelitis and inhibit inflammatory infiltration of the central nervous system. Thus, these compounds may be potential candidates for inhibition of Rho kinase and should be considered for further experimental study in relation to multiple sclerosis.
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