Antibacterial activity of tea saponin from Camellia oleifera shell by novel extraction method

Zhao, Ying; Su, Ruiqi; Zhang, Wenting; Yao, Guanglong; Chen, Jian

doi:10.1016/j.indcrop.2020.112604

Cited by 70 publications

(29 citation statements)

References 38 publications

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“…The DTG curves of raw WCOSs showed a wider range of stage II because of the complex components compared with hydrochars. 23 The peak in stage II gradually flattened out with the increase in HTC temperature. By contrast, the peak intensity becomes strong at stage III.…”

Section: Resultsmentioning

confidence: 97%

“…Stages II and III of the DTG curves showed opposite peak intensities due to the difference in the contents of VM and FC in hydrochars. The DTG curves of raw WCOSs showed a wider range of stage II because of the complex components compared with hydrochars . The peak in stage II gradually flattened out with the increase in HTC temperature.…”

Section: Resultsmentioning

confidence: 99%

“… 22 In this study, WCOSs were used to prepare all kinds of products. Zhao et al 23 obtained high concentration tea saponin via extraction and purification from WCOSs and analyzed the antibacterial activity of tea saponin. Zhang et al 24 designed an efficient catalytic route for the conversion of WCOS into furfural, and the results provide an attractive utilization option to WCOSs.…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Temperature on the Properties of Hydrochars Obtained by Hydrothermal Carbonization of Waste Camellia oleifera Shells

et al. 2021

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Hydrothermal carbonization (HTC) is a thermochemical conversion technique that can produce renewable solid biofuel by all types of waste. Waste Camellia oleifera shells (WCOSs) can be used to produce hydrochars via HTC. The effect of HTC temperature on the physicochemical properties and combustion behaviors of hydrochars was analyzed by varying from 150 to 300 °C. The mass yield of hydrochars decreased from 72.45% at 150 °C to 41.88% at 300 °C with the increase in temperature, and the higher heating value increased from 19.22 MJ/kg at 150 °C to 29.97 MJ/kg at 300 °C. The H/C and O/C values reduced from 1.30 and 0.66 of HTC150 to 0.77 and 0.27 of HTC300, respectively. Fourier transform infrared spectroscopy analysis indicated that the functional groups of hydrochar have changed because of the dehydration and decarboxylation reaction. The surface structure of hydrochars was rougher, and many pore structures were found at 240–300 °C by scanning electron microscopy analysis. The combustion behaviors of WCOSs and their hydochars are distinct via thermogravimetric analysis, and the stability of hydrochars was strengthened with the increase in HTC temperature.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Effect of Temperature on the Properties of Hydrochars Obtained by Hydrothermal Carbonization of Waste Camellia oleifera Shells

et al. 2021

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“…These types of compounds are present in a great number of medicinal herbs with antilithiatic and diuretic properties. Studies reported that saponins play an important role in preventing the formation of urinary stones [ 70 , 71 ]. The anti-crystallization property of saponins is due to their ability to act to inhibit crystal–cell interaction, which in turn reduces crystal retention in the urinary tract [ 72 ].…”

Section: Molecular Mechanism Of Bioactive Compounds Present In Medici...mentioning

confidence: 99%

Plants Used in Mexican Traditional Medicine for the Management of Urolithiasis: A Review of Preclinical Evidence, Bioactive Compounds, and Molecular Mechanisms

et al. 2022

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Urolithiasis (UL) involves the formation of stones in different parts of the urinary tract. UL is a health problem, and its prevalence has increased considerably in developing countries. Several regions use plants in traditional medicine as an alternative in the treatment or prevention of UL. Mexico has known about the role of traditional medicine in the management of urinary stones. Mexican traditional medicine uses plants such as Argemone mexicana L., Berberis trifoliata Hartw. ex Lindl., Costus mexicanus Liebm, Chenopodium album L., Ammi visnaga (L.) Lam., Eysenhardtia polystachya (Ortega) Sarg., Selaginella lepidophylla (Hook. & Grev.) Spring, and Taraxacum officinale L. These plants contain different bioactive compounds, including polyphenols, flavonoids, phytosterols, saponins, furanochromones, alkaloids, and terpenoids, which could be effective in preventing the process of stone formation. Evidence suggests that their beneficial effects might be associated with litholytic, antispasmodic, and diuretic activities, as well as an inhibitory effect on crystallization, nucleation, and aggregation of crystals. The molecular mechanisms involving these effects could be related to antioxidant, anti-inflammatory, and antimicrobial properties. Thus, the review aims to summarize the preclinical evidence, bioactive compounds, and molecular mechanisms of the plants used in Mexican traditional medicine for the management of UL.

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“…Tea saponin also has some effective pharmacological functions and is widely used in the cosmetics and pharmaceutical industries. [ 24,25 ] Camellia oleifera shell contains many aldehyde groups, so the Camellia oleifera shell is a good raw material for the preparation of furfural. [ 26 ] Tannin can be extracted to treat cardiovascular diseases, prevent and control tumor deterioration, and prepare tannin‐based phenolic resins.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional wood composites based on Camellia oleifera shell with harsh‐weather and self‐mildew resistance

et al. 2022

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Camellia oleifera shell is rich in lignin and tea saponin and other natural active substances, and it is used to directly prepare fuel and biochar, which are low‐value applications. Inspired by the tea oil fruit shell, a new type of wood‐based composite was designed, which was bonded between inner layers and coated on the surface with Camellia oleifera shell‐based phenolic resin through a one‐step manufacturing process. The acid catalyst type, reaction time, and substitution ratios (Camellia oleifera shell/phenol) were used to optimize the formulation and process of Camellia oleifera shell phenolic resin. The chemical structure, wet bonding strength, harsh‐weather resistance, thermal properties, and flame resistance of the composites (Camellia oleifera shell phenolic resin surface coated plywood [CSPCPs]) were evaluated. The results indicated that the CSPCPs showed better‐wet bonding strength and thermal properties and harsh‐weather resistance compared with the common uncoated plywood. CSPCP‐3 presented the maximum wet bonding strength of 1.63 MPa. The limiting oxygen indexes of the CSPCPs were all higher than that of common plywood. All CSPCPs displayed excellent acid rain corrosion resistance, with little mass loss under simulated acid rain conditions. Grayscale was used to compare the samples' color to assess their self‐mildew resistance. As the amount of shell increased, the mold resistance of CSPCPs increased. CSPCP‐3 showed excellent comprehensive performance and can be a multifunctional wood composite suitable for outdoor applications.

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Antibacterial activity of tea saponin from Camellia oleifera shell by novel extraction method

Cited by 70 publications

References 38 publications

The Effect of Temperature on the Properties of Hydrochars Obtained by Hydrothermal Carbonization of Waste Camellia oleifera Shells

The Effect of Temperature on the Properties of Hydrochars Obtained by Hydrothermal Carbonization of Waste Camellia oleifera Shells

Plants Used in Mexican Traditional Medicine for the Management of Urolithiasis: A Review of Preclinical Evidence, Bioactive Compounds, and Molecular Mechanisms

Multifunctional wood composites based on Camellia oleifera shell with harsh‐weather and self‐mildew resistance

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