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7. Comparison of metabolites in juice, seed and peel of sea buckthorn (Hippophae rhamnoidesL. subsp. sinensis)

Author

Wang, Chuangyun, Lei, Menglin, Zhang, Hong, Zhao, Lijuan, Mu, Zhixin, Wang, Meixia, Zhang, Jianhua, Deng, Yan, and Zhao, Li

Abstract

Sea buckthorn, a functional food, can provide several nutritious substances useful for human health. As we know, its peels and seeds are removed as inedible parts during processing. However, whether the peels and seeds have the nutritious substances that juice does not. The nutritious metabolites in the peels, juice, and seeds of Shanxi’s wild sea buckthorn were analyzed using ultra-high-performance liquid chromatography-quadrupole exactive Orbitrap mass spectrometry. A total of 456 metabolites were detected. Sixty-five of them were exclusively found in the peels, 55 were exclusively found in the juice, and 130 were exclusively found in the seeds. We found that several flavonoids, purines, nucleotides, and resveratrol were removed during the processing. This meant that we could get only a portion of the nutrition from the sea buckthorn juice in our daily lives. We suggest that peels and seeds should be added in a certain proportion during the processing, in order to obtain more nutrients from sea buckthorn.

Published
2024
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10. Selective Adsorption of Sodium Silicate on the Surface of Bastnaesite and Fluorite in Salicylhydroxamic Acid System under Alkaline Conditions.

Author

Wang, Maoyuan, Xiong, Wenliang, Xiao, Junhui, Guo, Yao, Deng, Jie, Chen, Da, Ouyang, Anni, Lei, Menglin, and Zhang, Lijun

Subjects
SOLUBLE glass, BASTNAESITE, FLUORITE, X-ray photoelectron spectroscopy, ADSORPTION capacity, ZETA potential
Abstract

During the flotation separation process of bastnaesite, it is difficult to separate bastnaesite from fluorite effectively. In this present study, sodium silicate (SS) can effectively improve the flotation separation effect of bastnaesite and fluorite in salicylhydroxamic acid (SHA) systemasa. Through relevant analyses, such as Zeta potential measurements, adsorption capacity tests, Fourier transform infrared (FTIR) spectroscopic analyses and X-ray photoelectron spectroscopy (XPS) tests, the selective suppressor of SS on fluorite was proven. At pH 10, the single mineral flotation results show that with the increase of SS dosage, the flotation recovery of fluorite rapidly decreases from 61.5% to 35.31%, while the flotation rate of bastnaesite is still high (recovery is 80.02%). Then, the experiment of artificial mixed ore proved that the flotation separation of fluorite and bastnaesite was effective under the appropriate dosage of inhibitor. The results of potentiodynamic measurement and an adsorption capacity test showed that the SiO OH 3 − structure of SS more easily reacted with fluorite, which further prevented the adsorption of SHA on the fluorite surface. FTIR test results and XPS analysis further showed that SS had a strong binding effect with the Ca site on the fluorite surface, but a weak binding effect with the Ce site on the bastnaesite surface. Consequently, SS can be used as an effective inhibitor in the flotation separation of fluorite and bastnaesite. [ABSTRACT FROM AUTHOR]

Published
2023
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