APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Liping Mei,Huanhuan Qiao,Fei Ke,Chuanyi Peng,Ruyan Hou,Xiaochun Wan,Huimei Cai
Zirconium dioxide-biochar (ZrO 2 /BC) with excellent fluoride adsorption properties, was successfully prepared by calcining the zirconium-impregnated byproduct from Camellia oleifera ( C. oleifera ) seed shell in a one-step method. Compared with C. oleifera seed biochar, the zirconium-impregnated C. oleifera seed shell biochar can effectively adsorb fluoride in water. The adsorption process is consistent with a pseudo second-order kinetic model and the Langmuir adsorption isotherm. Fluoride adsorption was tested in solutions ranging from pH to obtain the best pH value for adsorption. The fluoride adsorption mechanism was better understood by Zeta potential analysis. Thermodynamic studies indicated that the adsorption process was a spontaneous endothermic reaction. Scanning electron microscopy (SEM), Energy-Dispersive Spectroscopy (EDS) and X-ray diffraction (XRD) analyses revealed that the morphology and crystal form of the ZrO 2 /BC were improved and that fluoride could be effectively absorbed. Fourier-transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS) were used to show how ZrO 2 affects the surface of the zirconium-biochar and to show that the fluoride was removed from the water by ion exchange. This work can not only effectively remove fluoride from the water, but also reuse waste C. oleifera seed to reduce environmental pollution.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Chunling Chen,Yijun Pan,Yifei Niu,Dengfeng Peng,Wenjing Huang,Wangyang Shen,Weiping Jin,Qingrong Huang
Oil body (OB) is the lipid-storage organelle in oilseed, and its stability is crucial for oilseed processing. Herein, effects of roasting and boiling on the structure, stability, and in vitro lipid digestion of Camellia OB were studied. The interfacial structure and physical stability of the extracted OB were investigated by electrophoresis, confocal-Raman spectroscopy, zeta-potential, and surface hydrophobicity, etc . Boiling caused protein loss on the OB surfaces, forming a stable phospholipid interface, which resulted in coalescence of the droplets (d > 100 μm) and negative ζ-potential (-3 ∼ -8 mV) values at a pH of 2.0. However, roasting partially denatured the proteins in the seeds, which were adsorbed on the OB surfaces. The random coil structure of interfacial protein increased to ∼20 % after thermal treatment. Besides, heating decreased the surface hydrophobicity of OB and improved lipid digestion. After boiling 60 min, the extent of lipolysis increased from 41.7 % (raw) to 57.4 %.
研究领域:
食品科学
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植物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SURFACTANTS AND DETERGENTS
·
2013
·Vol. 17
·期 5
·919-928
·
IF 1.515
He Jun,Wu Zi-ying,Zhang Shuo,Zhou Yang,Zhao Feng,Peng Zhi-qin,Hu Zhi-wen
Microwave-assisted extraction (MAE) was utilized to extract tea saponin from oil-tea camellia seed cake. The factors influencing the extraction efficiency were studied, including the effects of microwave power, irradiation duration, temperature, ratio of solvent to material and aqueous ethanol concentration. By systematic orthogonal experiments, the optimal extraction technology was determined. Compared with a conventional extraction method, MAE shows great advantages with the extraction time reduced from 6 h to 4 min, 50 % organic solvent saved and about 14 % extraction yield enhanced. Fourier transform infrared spectroscopy testing and high performance liquid chromatography analysis proved that the extracted resultants were tea saponin with similar compounds as a standard tea saponin. The extracted tea saponin was applied on the cleaning of historic silks and showed good removal effect on the stains. This work provides useful information for fully use of oil-tea camellia seed cake and new applications of tea saponin at the protection of historic textiles.
研究领域:
植物化学
·
文物保护
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2024
·
IF 5.4
Juan Yang,Jiao Peng,Yu Lei,Yi Tang,Peng Liu,Junqing Zeng,Chaobai Yi,Yongqiang Shen,Liping Zheng,Xianyou Wang
Under the background of the current promotion of global green, environmental protection, and energy conservation, the sustainable conversion of low-cost agricultural waste biomass into high value-added products has become a hot topic. Herein, agricultural waste camellia seed shells obtained after pressing oil are used to prepare porous carbon materials with a high specific surface area (SSA) and excellent electrochemical properties for the application of supercapacitors. The effects of different chemical activators and mass ratios on the pore structure and electrochemical properties of agricultural waste camellia seed shell-derived activated carbon (CSSC) were investigated. It has been found that the CSSC activated by KOH presents excellent physical and electrochemical performances, and the pore structures of all the prepared activated carbons were predominantly a combination of mesopores and micropores. Especially, owing to the high SSA (1219 m2 g–1) and porous structure of the CSSC–KOH-1:3 material, the electrode provides an outstanding specific capacitance of 305 F g–1 at a current density of 0.5 A g–1. Furthermore, the symmetric supercapacitor assembled with CSSC–KOH-1:3 electrodes can deliver a high energy density (15.37 W h kg–1) and power density (12.9 kW kg–1), and it can still maintain high cycling stability even after 10,000 charge and discharge processes. Therefore, this work provides a significant exploration for the high-value application of the agricultural waste camellia seed shell and low-cost preparation of the porous carbon for the application of high-performance supercapacitors.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Miral Javed,Yanqun Xu,Haixin Sun,Huang Hao,Dong Li,Anam Matloob,Yan Xiaowei,Zisheng Luo
Lately, emulsions with low-fat and natural stabilizers are predominant. This study extracted the nano cellulose crystals (NCs) from Camellia Oleifera shells, and their gallic acid (GA) conjugates were synthesized by free-radical grafting. Pickering emulsions were prepared using NCs 1 %, 1.5 %, 2.5 %, and gallic acid conjugates NC-GA1, NC-GA2, and NC-GA3 as stabilizers. The obtained nano cellulose crystals exhibited 18–25 nm, −40.01 ± 2.45 size, and zeta potential , respectively. The contact angle of 83.4° was exhibited by NC-GA3 conjugates. The rheological, interfacial, and microstructural properties and stability of the Pickering emulsion were explored. NC-GA3 displayed the highest absorption content of 79.12 %. Interfacial tension was drastically reduced with increasing GA concentration in NC-GA conjugates. Rheological properties suggested that the low-fat NC-GA emulsions showed a viscoelastic behavior , increased viscosity, gel-like structure, and increased antioxidant properties. Moreover, NC-GA3 displayed reduced droplet size and improved emulsion temperature and storage stability (28 days) against phase separation. POV and TBARS values were reduced with the NC-GA3 ( P < 0.05). This work confirmed that grafting phenolic compounds on NCs could enhance bioactive properties, which can be used in developing low-fat functional foods. NC-GA conjugates can potentially fulfill the increasing demand for sustainable, healthy, and low-fat foods.
研究领域:
食品科学
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材料科学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD HYDROCOLLOIDS
·
2025
·
IF 12.4
Jiaru Lin,Chenhao Liang,Tong Lin,Ruimin Zhong,Yong Cao,Yaqi Lan
Emulsion gels with unique structure and mechanical properties have great potential in 3D food printing applications. In this study, the rheological properties and 3D printing characteristics of Camellia seed protein (CSP) emulsion gels were investigated by incorporating three different polysaccharides: anionic xanthan gum (XG), highly branched neutral guar gum (GG), and lowly branched neutral locust bean gum (LBG). The influence of the polysaccharide type on the printability, rheological properties, microstructure, and water distribution properties of inks were analyzed. Results indicated that CSP-XG ink exhibited superior dimensional accuracy, excellent self-supporting capability, and a smooth surface with minimal flaws. While CSP-GG ink presented a rougher surface texture and structural collapse. Rheological analysis demonstrated that the addition of polysaccharides significantly enhanced the mechanical properties of the paste, with CSP-XG ink exhibiting the highest gel strength of 656.8 Pa, compared to CSP emulsion gel (491.2 Pa), providing the highest hardness in the 3D printed products. Microstructure observations and Fourier transform infrared (FTIR) analysis suggested that the interactions between CSP and XG were stronger than those between CSP and GG or LBG. Low-field nuclear magnetic resonance (LF-NMR) results revealed that XG reduced water mobility and enhanced gel density. While GG primarily relied on its high viscosity to limit water mobility. The presence of LBG enhanced the water-holding capacity due to its long chain structure. This study highlighted the potential for further development of CSP emulsion gels as 3D printing inks, offering new insights into optimizing food ink formulations for improved stability and performance.
研究领域:
食品科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FOOD SCIENCE
·
2020
·Vol. 85
·期 5
·1450-1461
·
IF 2.479
Xiaoqin Wang,Wencong Jia,Guoyin Lai,Lijuan Wang,María del Mar Contreras,Daomao Yang
Bound phenolic compounds have rarely been reported in vegetable oils and this may be due to little research about the extraction. Deep eutectic solvents (DESs), recently applied in the extraction of phenolic compounds as alternatives to organic solvents, were adopted in the extraction of free and bound phenolic compounds from tea seed oil in this work. First, the phenolic compounds were analyzed by ultra-high-performance liquid chromatography with quadrupole-time-of-flight and triple-quadrupole tandem mass spectrometry (UHPLC-Q-TOF-MS/MS) for characterization and UHPLC-QqQ-MS/MS for quantification and 25 phenolic compounds were found to exist in both free and bound forms. Then, DESs were screened for extraction of free and bound phenolic compounds from tea seed oil as the pretreatment for analysis and the results showed that hydrogen bond donors (HBDs) and temperature significantly affected the extraction efficiency of DESs. Finally, free phenolic compounds (83.91 µg/g) and bound phenolic compounds (25.71 µg/g), extracted by the DES with glycerol as HBD at 50 °C, were 51.0% and 93.2% higher than those extracted by methanol/water (60%, v/v), respectively. This work not only advanced the basic data of phenolic compounds in tea seed oil but also explored an efficient extraction method for scientific analysis of free and bound phenolic compounds.
研究领域:
食品科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Processes
·
2024
·Vol. 12
·期 7
·1332
·
IF 2.8
Li Ma,Jing Gao,Zhen Zhang,Xiaoyang Zhu,Bolin Chen,Yongzhong Chen,Senwen Deng,Zhigang Li,Xinzhi Chen
The drying process employed for camellia seeds has a significant impact on the quality of camellia seed oil (CO), but research on its influence on the flavor of CO is limited. This study investigated the effects of two typical drying processes, sun-drying and hot-air-drying, on the volatile composition of CO using Gas Chromatography-Ion Mobility Spectrometry (GC-IMS) technology. The results revealed that the CO obtained from hot-air-drying seeds exhibited a higher content of saturated fatty acids, while the levels of unsaturated fatty acids decreased. Additionally, the acid value and peroxide value of the CO obtained from hot-air-drying seeds were also elevated. GC-IMS analysis detected a total of 53 volatile compounds (including monomers and dimers) in the CO. Notably, aldehyde compounds exhibited the highest relative content (38.56–40.75%), followed by alcohols (32.14–38.01%), acids (4.86–14.58%), and esters (3.61–17.73%), while ketones exhibited relatively lower content (2.33–3.75%). The fingerprint profiles indicated that most of the flavor compounds exhibited differences in their content between the two samples. Specifically, the relative abundance of complex aldehyde and ester compounds was higher in the hot-air-dried sample compared to the sun-dried one, while the relative content of acid compounds decreased significantly. The relative odor activity value (ROAV) method identified hexanal as the most important key aroma component in both oil samples. The fingerprint profiles combined with principal component analysis (PCA) demonstrated that GC-IMS can effectively distinguish samples obtained from different drying treatments. Therefore, through the adjustment of drying methods, CO with various flavor characteristics can be obtained. This study provides valuable theoretical and technical references for CO production and flavor research.
研究领域:
食品科学
·
植物学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2018
·
IF 3.909
Sheng Zhang,Xiangzhou Li
We isolated and purified polysaccharide from the Camellia oleifera Abel. seed cake (CCP) and studied its hypoglycemic activity in vitro . The molecular weight of CCP was 4736 Da and the monosaccharide molar composition ratio was: Xylose :Glucuronic acid:Galactosamine:Mannose = 10.9:4.4:2.6:1.8. The CCP contained conjugated proteins and belonged to acidic polysaccharide, which can promote the consumption of the glucose in the medium by HepG2 cells within the range of 0.125–0.500 mg/mL. Relative consumption rate (RCR) of the glucose was the highest at 0.5 mg/mL, exceeded that of the metformin hydrochloride, as well as that of Tea Polysaccharide under the same concentration. A meaningful structure activity relationship (SAR) of hypoglycemia polysaccharides had established. This result suggests that CCP can be used as hypoglycemic medicine or health food.
研究领域:
生物化学
·
药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD RESEARCH INTERNATIONAL
·
2017
·
IF 3.086
Xiaoqin Wang,Qiumei Zeng,María del Mar Contreras,Lijuan Wang
In Asia, tea seed oils (seed oils from Camellia oleifera , C. chekiangoleosa , and C. sinensis ) are used in edible, medicinal, and cosmetic applications. However, these oils differ in their fatty acid contents, and there is little known about their phenolic compounds . Here we analyzed the phenolic compounds of seed oils from three species gathered from 15 regions of China. Twenty-four phenolic compounds were characterized by HPLC-Q-TOF-MS, including benzoic acids (6), cinnamic acids (6), a hydroxyphenylacetic acid, flavanols (4), flavonols (3), flavones (2), and dihydroflavonoids (2). Some of these phenolic compounds had not previously been reported from C. sinensis (20), C. oleifera (15), and C. chekiangoleosa (24) seed oils. Quantification was done by HPLC-QqQ-MS using 24 chemical standards. The total concentrations in the studied samples ranged from 20.56 to 88.56 μg/g. Phenolic acids were the most abundant class, accounting for 76.2–90.4%, with benzoic acid, found at up to 18.87 μg/g. The concentration of catechins, typical of tea polyphenols, ranged between 2.1% and 9.7%, while the other flavonoids varied from 4.2% to 17.8%. Although the cultivation region affected the phenolic composition of the Camellia seed oils, in our hierarchical clustering analysis, the samples clustered according to species. The phenolic composition of the seed oils from C. oleifera and C. chekiangoelosa were similar. We found that the phenolic categories in Camellia seed oils were similar to tea polyphenols, thereby identifying a source of liposoluble tea polyphenols and potentially accounting for some of the reported activities of these oils. In addition, this work provides basic data that allows distinction of various Camellia seed oils, as well as improvements to be made in their quality standards.
研究领域:
植物化学
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食品科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 22
·10273-10283
·
IF 2.7
Jing Liao,Ke Yin,Xiaodong Chen,Bichun Huang
The preparation of efficient and cheap adsorbents is important for the removal of chlorinated volatile organic compounds, which are carcinogenic, teratogenic, and mutagenic to human health. In this study, ethylenediamine and ZnCl2 were introduced simultaneously into Camellia oleifera shell-based biochar by the impregnation method. A series of nitrogen doped porous carbons (ANOC-x) were prepared by adjusting the ethylenediamine impregnation ratio combined with NaOH activation. Among them, the chlorobenzene adsorption capacity of ANOC-1.5 reached 1187 mg g−1, which was 1.4 times that of undoped porous carbon. This was attributed to that ANOC-1.5 had the maximum specific surface area (2685 m2 g−1) and a hierarchical porous structure, which provided abundant adsorption sites and mass transfer channels for chlorobenzene adsorption. In addition, the chlorobenzene adsorption performance of porous carbon was highly correlated with surface defects, which was attributed to the fact that the surface of ANOC-1.5 (0.615 at%) contains more pyrrole heterocycles than AOC (0.258 at%), forming more π-electron rich defect sites. These defect sites had strong π–π interactions with chlorobenzene molecules, which could easily bind with the aromatic rings of chlorobenzene, thus improving the adsorption capacity of chlorobenzene. Moreover, ANOC-1.5 had high thermal stability and excellent regeneration performance, and its adsorption capacity for chlorobenzene remained above 90% after five regeneration tests, which exhibited potential for industrial applications.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF BIOSCIENCE AND BIOENGINEERING
·
2019
·
IF 2.032
Li Peng,Qin Ye,Xiaoying Liu,Shulai Liu,Xianghe Meng
Aqueous enzymatic extraction of Camellia sinensis oil was studied. The results suggested that saponin removal pretreatment assisted by ultrasound was effective in decreasing emulsification and in enhancing the free oil recovery. After 70% isopropanol extraction for 30 min under ultrasound, the residue of C. sinensis seeds was further hydrolyzed with free cellulase and Alcalase for 5 h, and calcium ions were concurrently added during enzymatic hydrolysis ( n Ca 2+ : n saponin = 1:2), and free oil recovery up to 94.14% was obtained. Separate immobilization and co-immobilization of Alcalase and cellulase were performed by alginate entrapment combined with glutaraldehyde crosslinking. Specific activity and recovery of activity for Alcalase and cellulase were acceptable. After immobilization, Alcalase and cellulase exhibited higher activity at a wider pH and temperature range. Reuse experiments of immobilized enzymes were conducted. The deactivation kinetics immobilized enzymes were simulated and half-life of immobilized enzyme was estimated. The results indicated that a magnetic supporter facilitated the recovery of immobilized enzymes from tea seed slurry, and that immobilized Alcalase and cellulase had good reusability.
研究领域:
食品科学
·
生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）