FOOD CHEMISTRY
·
2024
·
IF 8.5
Qiuhui Xu,Jie Wang,Dan Wang,Xin Lv,Li Fu,Ping He,Desheng Mei,Hong Chen,Fang Wei
Rapeseed ( Brassica napus L. ) is the second largest globally cultivated oil crop, but the effects of post-harvested ripening on rapeseed quality is unclear and unpredictable. This study reveals the relationship between post-harvest ripening periods (PHR) and physicochemical quality of different rapeseed cultivars using comprehensive physicochemical indicators analysis. The results indicate that PHR led to a gradual decrease in chlorophyll, carotenoid and moisture content but continually increased oil and total phenol content (TPC). Besides, 295 lipid molecules from 13 lipid subclasses were identified, revealing that the relative content of triacylglycerol (TG) was progressively increased while diacylglycerol (DG) demonstrated a consistent decline throughout the PHR. Correlation analysis, hierarchical cluster analysis (HCA) and principal component analysis (PCA) were employed to construct and verify the comprehensive quality evaluation model for rapeseeds in PHR. This paper develops a comprehensive quality evaluation model for post-harvest ripening rapeseeds and advances the development of agricultural products.
研究领域:
植物学
·
食品科学
·
农学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
·
2024
·
IF 7.7
Qi Guo,Xiaofeng Yue,Xin Qi,Xinyao Feng,Xuefang Wang,Xiaofeng Hu,Fei Ma,Liangxiao Zhang,Peiwu Li,Li Yu
The aim of this survey was to evaluate the residue levels, distribution and exposure risk of the 38 most commonly used pesticides in rapeseed samples collected from the main production areas in China over a two-year period. The sampling area covered 12 provinces, including Guizhou, Shaanxi, Yunnan, Hunan, Jiangxi, Sichuan, Chongqing, Anhui, Henan, Hubei, Zhejiang, and Jiangsu provinces. The pesticide residues were determined using a QuEChERS (Quick Easy Cheap Effective Rugged and Safe) method coupled with gas chromatography-tandem mass spectrometry and liquid chromatography-tandem mass spectrometry. 8.4% of the rapeseed samples contained pesticides with a residue level ranging from 0.001 to 0.634 mg/kg. The detected analytes were imidacloprid , quizalofop-P-ethyl, thiamethoxam , paclobutrazol , prochloraz, tebuconazole , difenoconazole, s-metolachlor, carbofuran , and carbendazim . The concentrations of four analytes, including thiamethoxam, difenoconazole, carbendazim and prochloraz, exceeded the maximum residue level set by the Chinese government for rapeseed, with exceedance rates of 0.1%, 0.1%, 0.1%, and 1.1%, respectively. Based on the index of quality for residues (IqR) values, 91.6% of the total rapeseed samples had an IqR category of Excellent (IqR = 0). Only 1.5% of the tested samples were of inadequate quality. Furthermore, the assessment of chronic and acute exposure, as well as health risks associated with pesticide residues in rapeseed, was conducted for different age groups within the Chinese population, including adults (6–14 years), children (15–49 years), and the elderly (50–74 years). The results of this assessment indicated that pesticide residues in rapeseed cultivated in China are not expected to be of short- or long-term risks to the Chinese customers.
研究领域:
食品安全
·
环境科学
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Baofang Zhang,Renlian Chen,Zefan Yang,Yingxin Chen,Lihua Zhou,Yong Yuan
The heteroatom-doped porous carbon material as an alternative to commercial Pt/C catalysts in oxygen reduction reaction has attracted extensive attention. In this study, the rapeseed meal-based material (ARM-900) prepared by carbonization with high temperature and activation with ZnCl 2 had a porous structure and was doped with N and S heteroatoms. Compared to commercial Pt/C catalysts (onset potential of 0.95 V vs. RHE and limiting diffusion current of −5.7 mA cm −2 ), ARM-900 demonstrated excellent electrocatalytic performance with an onset potential of 0.98 V vs. RHE and limiting diffusion current of −8.1 mA cm −2 in O 2 saturated 0.1 M KOH solution. Meanwhile, ARM-900 had higher durability and more superior methanol tolerance than Pt/C catalyst. The excellent ORR performance of ARM-900 was derived from the formation of abundant pore structure and the doping of the autochthonous N and S heteroatoms. MFCs with ARM-900 as the cathode had the maximum power density of 808 mW/m 2 , which was obviously better than Pt/C (709 mW/m 2 ). This study provided an environment-friendly and effective strategy for the reuse of rapeseed meal and the preparation of N and S-doped non-metallic ORR catalysts.
研究领域:
能源材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2023
·
IF 4.3
Peng Sun,Zhao Yu,Chao Wang,Shuo Li
The cholesterol, cholestanol, brassicasterol , ergosterol , campesterol , stigmasterol , β-sitosterol, and stigmastanol content of rapeseed was determined herein. The sterols were isolated after derivatization and determination using pressurized liquid extraction coupled with gas chromatography–mass spectrometry. The results revealed a good linear relationship between the peak area and the corresponding mass concentration of the eight sterols in the range of 2–1000 mg/L, with correlation coefficients greater than 0.9991, detection limits of 1.12–1.52 mg/kg, quantification limits of 3.73–4.98 mg/kg, and satisfactory mean relative recoveries determined at 5–20 mg/kg and 200–1000 mg/kg. The mean relative recoveries were 92.5–104 % at the mg/kg supplemental level, and the precision was under 4.8 %. The developed method was efficient, simple, and accurate, suitable for the qualitative and quantitative analysis of sterols in rapeseed and providing a method for their rapid determination.
研究领域:
分析化学
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植物学
·
食品科学
✓ 已验证
产品关联
DOI
高影响因子
Applied Sciences-Basel
·
2017
·Vol. 7
·期 10
·1036
·
IF 1.679
Mingbo Zheng,Qin Hu,Songtao Zhang,Hao Tang,Lulu Li,Huan Pang
Lithium–sulfur batteries have drawn considerable attention because of their extremely high energy density. Activated carbon (AC) is an ideal matrix for sulfur because of its high specific surface area, large pore volume, small-size nanopores, and simple preparation. In this work, through KOH activation, AC materials with different porous structure parameters were prepared using waste rapeseed shells as precursors. Effects of KOH amount, activated temperature, and activated time on pore structure parameters of ACs were studied. AC sample with optimal pore structure parameters was investigated as sulfur host materials. Applied in lithium–sulfur batteries, the AC/S composite (60 wt % sulfur) exhibited a high specific capacity of 1065 mAh g−1at 200 mA g−1and a good capacity retention of 49% after 1000 cycles at 1600 mA g−1. The key factor for good cycling stability involves the restraining effect of small-sized nanopores of the AC framework on the diffusion of polysulfides to bulk electrolyte and the loss of the active material sulfur. Results demonstrated that AC materials derived from rapeseed shells are promising materials for sulfur loading.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
可持续材料
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电池技术
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Kanjun Sun,Dongyang Guo,Xiaoping Zheng,Yanrong Zhu,Yanping Zheng,Mingguang Ma,Guohu Zhao,Guofu Ma
In this paper, nitrogen-doped activated carbons obtained from rapeseed residues (N-RCs) as supercapacitor electrodes are successfully synthesized by a simple chemical activation method. The field emission scanning microscope, transmission electron microscopy, and N 2 adsorption-desorption tests demonstrate that N-RCs treated with ZnCl 2 can produce a large number of mesopores. Additionally, the N-RCs have certain amount of nitrogen (nitrogen content in N-RC2 is 6.55% by element content analysis). As the electrode material, N-RC2 exhibits ideal capacitive behavior in 6 mol L -1 KOH aqueous electrolyte in a three-electrode system tests, and the maximum specific capacitance reaches 250 F g -1 at a current density of 0.5 A g -1 . Furthermore, in 0.5 mol L -1 Na 2 SO 4 aqueous electrolyte, the as-assembled N-RC2//N-RC2 symmetric cell exhibits high energy density of 13.55 Wh kg -1 at a power density of 399.80 W kg -1 operated at the voltage range of 0 to 1.8 V and an excellent cycleability retaining about 92.8% initial capacitance after 5000 cycles.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
环境功能材料
✓ 已验证
DOI
高影响因子
Metabolites
·
2021
·Vol. 11
·期 9
·589
·
IF 4.932
Dandan Wang,Liangxiao Zhang,Li Yu,Fei Ma,Peiwu Li
The simultaneous quantification of trace and micro metabolites is a bottleneck in food and biological analysis. Phenolic compounds are the most widely distributed and have various physiological functions. In this study, the strategy for the simultaneous liquid chromatography tandem-mass spectrometry (LC-MS/MS) quantification of 13 trace and micro phenolic compounds was proposed by taking product ions and isotopic ions as quantitative ions. The method validation results showed that the limits of detection (LODs) were from 0.01 to 9.84 μg/kg, and the limits of quantification (LOQs) were from 0.03 to 32.8 μg/kg. The intra-day precision and inter-day precision were below 8.4% and 14.4%, respectively. The recoveries ranged from 81.9% to 117.2%, and the matrix effects ranged from −11.5% to 13.7%, which indicated that the method has high sensitivity and suitable stability. The developed analytical method was applied to determine trace and micro constituents in rapeseed samples. The analysis results indicated that the contents of sinapine have significantly different between high and low total phenolic content rapeseeds. This method provides a reference strategy for the simultaneous quantitative analysis of other micro- and trace antioxidants.Keywords:simultaneous quantification;isotopic ion;trace and micro-metabolites;LC-MS/MS
研究领域:
分析化学
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食品科学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD RESEARCH INTERNATIONAL
·
2025
·
IF 8
Xinyue Xiang,Zihua Liu,Wenfei Xiong,Yijun Yao,Chao Chen,Lifeng Wang
This study investigates the impact of pH-shift treatment on the properties of rapeseed protein high internal phase emulsions (HIPEs). The results demonstrate that pH-shift treatment significantly enhances the functional characteristics of HIPEs. Morphological and confocal laser scanning microscopy (CLSM) observations reveal that treated HIPEs exhibit superior gel-like semi-solid characteristics with smaller, closely packed droplets and a more compact structure, showing no oil phase separation. Rheological analysis indicates that pH-shift treated HIPEs possess better viscoelasticity and gelation properties, reflected in a higher storage modulus (G'). The pH-shift treatment also increases the centrifugal stability of HIPEs, indicating enhanced oil binding capacity. Furthermore, treated HIPEs demonstrate significantly improved freeze-thaw stability compared to untreated samples and mitigate the destabilizing effects of thermal processing, preventing the decline in viscoelasticity post-heating. These findings underscore the effectiveness of pH-shift treatment in improving the stability, structure, and functional resilience of rapeseed protein HIPEs, making them suitable for applications requiring high stability and consistent performance.
研究领域:
食品科学
·
胶体与界面科学
·
生物技术
·
材料科学
✓ 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）