APPLIED ENERGY
·
2015
·
IF 5.613
Leichang Cao,Shicheng Zhang
Using inexpensive and high-quality oil feedstock is an effective means to produce low-cost biodiesel. This work investigated the production and fuel properties of biodiesel derived from Hodgsonia macrocarpa (HM). The oil content of HM seed was 71.65 wt%, which is much higher than that of many potential oil plants. With traditional base-catalyzed transesterification, biodiesel was readily prepared from HM seed oil. The biodiesel yield was 95.46 wt% from HM seed oil. Biodiesel derived from HM met all ASTM D6751 and EN 14214 specifications, except for oxidative stability (OS). The OS specifications of the two biodiesel standards were met after treatment of HM biodiesel with 400 ppm tertbutyl hydroquinone. The biodiesel exhibited excellent transportation safety and cold flow properties, with flash point of 153 °C, pour point of −9 °C, and cold filter plugging point of −7 °C.
研究领域:
生物能源
·
化学工程
·
植物学
✓ 已验证
DOI
高影响因子
Frontiers in Plant Science
·
2023
·
IF 5.6
Jin Yuan,Tian Hongwu,Gao Zhen,Yang Guiyan,Dong Daming
Rapid, non-destructive and reliable detection of the oil content of corn seeds is important for development of high-oil corn. However, determination of the oil content is difficult using traditional methods for seed composition analysis. In this study, a hand-held Raman spectrometer was used with a spectral peak decomposition algorithm to determine the oil contents of corn seeds. Mature and waxy Zhengdan 958 corn seeds and mature Jingke 968 corn seeds were analyzed. Raman spectra were obtained in four regions of interest in the embryo of the seed. After analysis of the spectra, a characteristic spectral peak for the oil content was identified. A Gaussian curve fitting spectral peak decomposition algorithm was used to decompose the characteristic spectral peak of oil at 1657 cm−1. This peak was used to determine the Raman spectral peak intensity for the oil content in the embryo and differences in the oil contents among seeds of varying maturity and different varieties. This method is feasible and effective for detection of corn seed oil.
研究领域:
植物学
·
农业科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2023
·
IF 5.9
Guorong Fan,Xiaodan Ning,Shangxing Chen,Liang Zhong,Chunce Guo,Yuling Yang,Juan Liu,Ming Tang,Guoxiang Liao,Xuefang Wang,Zongde Wang,Jiawei Wang
Litsea cubeba (Lour.) Pers. is an important industrial tree in southern China and Southeast Asia. We surveyed and sampled wild L. cubeba in 32 provenances spread across nine provinces of China. We used nested variance analysis, multiple comparisons analysis, hierarchical clustering analysis, Pearson’s correlation analysis, path analysis with multiple stepwise regression, detrended correspondence analysis, redundancy analysis, and variance partitioning analysis to evaluate the phenotypic diversity of fresh fruit yield (FFY) and essential oil (EO) characteristics of L. cubeba , and to explore the relationship between the main habitat factors and phenotypic diversity. We detected wide phenotypic diversity in FFY, EO content (EOC), citral yield (CitrY), and the proportions of the seven main components of EOs (citral, D -limonene, 3,7-dimethyl-3,6-octadienal, 4-methyl-3-pentenal, linalool , citronellal , and 1-(cyclopanecarbonyl)piperidin-4-one). The variation was mainly derived from among provenances ( P ≤ 0.01) rather than within provenances, and the variation in FFY and CitrY was greater than that of EOC and the seven dominant components among provenances. We also detected several region-specific components of EOs in fresh fruit, including α-terpineol, geraniol , eucalyptol , and 7-methyl-3-methyleneoct-6-enal. Most of the provenances with higher FFY were distributed in southwestern China (lower longitude and latitude, and higher elevation), while most of those with higher EOC were distributed in southeastern China (higher longitude and latitude, and lower elevation). The three provenances with excellent FFY were YN-XC, GZ-ZY, and SC-KJ; the two with higher EOC were SC-KJ and HN-DX; and CitrP was higher in GZ-ZF than in other provenances. Longitude, total potassium content (TotalKC), and bulk density (BD) were the most important factors that influenced FFY diversity, while latitude, elevation, annual average relative humidity (AARH), and organic carbon content (OCC) most strongly influenced EOC diversity, and annual average temperature and annual average maximum temperature (AAMaxT) influenced CitrP diversity. The six main habitat factors together explaining the largest proportions of phenotypic diversity were longitude, AARH, AAMaxT, elevation, latitude, and soil total phosphorus content (TotalPC). Higher soil TotalKC, BD, and TotalPC were suitable conditions for cultivation of L. cubeba to achieve higher FFY, while lower AARH and OCC were favorable for accumulation of EOs, and only lower temperature was more likely conducive to citral synthesis. The wide diversity of FFY and EO characteristics should be taken into account when selecting germplasms for protection and utilization, and the identification of the most important environmental factors affecting phenotypic diversity provides a theoretical basis for the optimization of L. cubeba cultivation.
研究领域:
植物学
·
生态学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Bowen Yang,Tian Zhao,Shengyang Ji,Yan Liu,Minghao Xu,Baiyi Lu
Phytosterol , recognized for its health benefits, is predominantly extracted from plants and exhibits significantly reduced stability under varying light conditions. Their photooxidation is significantly influenced by emulsion interfaces. This study examined the mechanism of interface structure on phytosterol photooxidation with unparalleled molecular precision, utilizing molecular dynamics simulations and experimental procedures. Hydrogen bonding between the hydroxyl group at the C3 position of phytosterols and water molecules, coupled with van der Waals forces between the hydrophobic regions and the oil phase, induced phytosterol molecules to disperse toward the interface. The elevated polarity of the oil phase, specifically in tributyrin , facilitated the permeation of water molecules into the oil phase. This was achieved by diminishing the emulsion's interfacial tension , thereby fostering the development of more interface or micelles , and accelerating the photooxidation process of phytosterols. These simulations unraveled that the preponderance of phytosterol distribution is localized and oxidized at the oil-water interface.
研究领域:
食品科学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Yunfei Han,Yuting Chen,Yong Wang,Mingxin Zhao,Xia Sun,Yemin Guo,Dianbin Su,Huihui Xu
The traditional drying method of Fresh Z. bungeanum has the problems of long drying time and serious loss of nutrients, which seriously restricts its efficient and high-value utilization. This study utilized a self-developed penetrating microwave infrared hot air rolling bed dryer (PMIHRBD) to optimize the drying process and compare microwave hot air drying, microwave pretreated hot-air drying (PM t -HD), and freeze drying with hot air drying (HD). The results showed that the drying time of PM 10 -HD was 48 % shorter than that of HD, and the contents of TFC, TPC and TAC were increased by 17.6 %, 23.7 % and 20.7 %, the yield of essential oil was increased by 59.6 %, and the antioxidant activity was significantly enhanced. According to the identification of VOCs, hydrocarbons, esters and alcohols played a major role in the formation of Z. bungeanum odor, and HD samples had similar characteristics to PM 10 -HD samples. For flavor, PM 10 -HD showed a higher five-flavor richness than other drying processes. In summary, PM 10 -HD provided a fast and efficient drying process for harvesting high quality Z. bungeanum .
研究领域:
食品科学
·
植物学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Yujia Tong,Jinbo Chen,Wenlong Ding,Lijian Shi,Weixing Li
Hydrophilic polyvinylidene fluoride (PVDF) membranes can effectively separate the low oil content in semicoking wastewater. It is important to develop a stable superhydrophilic PVDF membrane with high oil rejection. Here, we developed a one-step strategy based on a polyphenol netlike structure coating to achieve the conversion of commercial membranes from hydrophobic to superhydrophilic; namely, the codeposition of 2-propenamide, N-[2-(3,4-dihydroxyphenyl)ethyl] (DMA) and 3-aminopropyltriethoxysilane (APTES) in aqueous solution. ATR-FTIR and XPS technologies proved that the coating successfully adhered to the PVDF membrane. The pure water flux of the developed membrane was 17 270 L m–2 h–1 bar–1. When treating simulated semicoking wastewater with low oil content, the permeate flux and the oil content of the filtrate were 5500 L m–2 h–1 bar–1 and <6.5 mg L–1, respectively. The modified PVDF membrane showed perfect wetting performance. The permeation flux of the real semicoking wastewater cycled 9 times was stable at 4530 L m–2 h–1 bar–1 and the oil content of the filtrate was <12.5 mg L–1. This work emphasizes a simple way to design superhydrophilic membranes for the separation of low-oil content emulsion, which will be promising for treating semicoking wastewater.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Biobased Materials and Bioenergy
·
2019
·Vol. 13
·期 1
·29-35
·
IF 0
Qin Chengrong,Wang Cheng,Liu Baojie,Huang Lingzhi,Liang Chen,Yao Shuangquan
The polymer-blend films (PBFs) have the potential to be utilized as packaging material for enhancing food shelf life. But the most important factor restricting the application is low mechanical strength. Recycling hemicellulose can be used as a new value-added product to increase economic
efficiency. In this paper, bagasse hemicellulose was extracted by pH pre-controlled hot water extraction. Its utilization in the reinforcement of a gelatin/carrageenan PBFs was studied. The effect of reaction parameters on the tensile strength (TS) and elongation at break (EAB) of PBFs was
studied. The most important reaction parameter was hemicellulose dosage. The optimum preparation process of PBFs was determined by the response surface analysis method. The optimum reaction conditions of TS was 34.84 °C, glycerin dosage 1.43%, hemicellulose dosage 0.92%, TS was 54.19 MPa.
The optimum reaction conditions of EAB was 34.92 °C, glycerin dosage 1.45%, hemicellulose dosage 0.87%, EAB was 26.42%. The results provide theoretical support for the application of hemicellulose in food packaging.
研究领域:
食品科学
·
材料科学
✓ 已验证
DOI
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2017
·
IF 1.591
Yu Qing Zhu,Xing Chen,David Julian McClements,Liqiang Zou,Wei Liu
A novel Pickering-stabilized emulsion gel with controlled rheological properties was derived from wheat gliadin nanoparticles-stabilized emulsions by altering preparation conditions (pH, ionic strength or oil content). The formed nanoparticles were relatively small uniform spheres particles (d < 120 nm), whose surface potential (ζ-potential) changed from +9.9 mV to −14.19 mV with the pH of the solution increased from 3.5 to 9. The isoelectric point of gliadin nanoparticles was around pH 6.8. The nanoparticles were highly susceptible to aggregation at pH values near their isoelectric point due to a reduction of electrostatic repulsion between them. Pickering-stabilized emulsions could be formed by blending the nanoparticles with oil and water, and Pickering-stabilized emulsion gels were obtained by altering pH, ionic strength or oil content of the dispersions. Creaming stabilities and rheological properties of the emulsion gels were modulated. Stable Pickering-stabilized emulsion gels with relatively large elastic modulus were formed with 70% oil content at pH 5.5 and 6.0 in the absence of NaCl. The viscosity increased with the increasing of oil content and salt concentration, and the viscosity enhanced when the pH around the isoelectric point. These results may facilitate the design of novel viscoelastic emulsion gels with the Pickering-stabilize mechanism which are suitable for utilizing in foods and other products.
研究领域:
食品科学
·
胶体与表面化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Lang Cai,Rui Wang,Yufei Li,Shixin Song,Lei Yu
This study is dedicated to fabricating rice bran protein particles (RBPPs) through a thermal-acid modification strategy and exploring their potential as Pickering emulsifiers. The results confirmed that compared with rice bran protein (RBP), RBPPs exhibited enhanced hydrophobicity, reduced interfacial tension, and favorable wettability (83.4 ± 5.2°). Subsequently, Pickering emulsions were constructed using RBPPs as emulsifiers, and the effects of RBPPs concentration and oil phase fraction on the structure and performance of the emulsions were investigated. The results indicated that increasing the RBPPs concentration or oil phase fraction could enhance the stability and viscoelasticity of Pickering emulsions. Confocal laser scanning microscopy (CLSM) and interfacial protein content results demonstrated that at 4.0 wt% RBPPs concentration or 75 % oil phase fraction, the emulsions exhibited the highest interfacial protein content and formed a tight interfacial film, thereby endowing it with excellent storage stability, centrifugal stability, and the ability to protect lipids. Additionally, adjusting the pH value could effectively regulate the structure and performance of the emulsions. This research is of great significance for the development of new Pickering emulsifiers and the preparation of Pickering emulsions with adjustable structure and performance.
研究领域:
食品科学
·
胶体与界面科学
·
生物高分子工程
·
乳液技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF FOOD PROTECTION
·
2021
·
IF 2.077
Lipeng Han,Ye He,Shujie Wang,Weiwei Cheng,Lukai Ma,Guoqin Liu,Dongxue Han,Li Niu
ABSTRACT Fat-related diseases and chemical hazards produced during the frying process pose a major threat to human health. Coatings have been used as a practical method to reduce the amount of oil and chemical hazards associated with fried foods. Methyl cellulose (MC) and soy protein isolate were used as coating materials to pretreat Chinese fried dough cake (CFDC) before frying. The 1.5% MC concentration was the best choice for coating to simultaneously lower oil and chemical hazards in CFDC. The CFDC prepared using 1.5% MC had 11.3% oil, 73.70 μg/kg acrylamide, 0.15 mg KOH/100 kg acid, 8.54 mmol/kg peroxide, p -anisidine value of 6.36, 0.36 μg/g malondialdehyde, 0.13 μg/g 4-hydroxy-2-( E )-hexenal (HHE), 0.51 μg/g 4-hydroxy-2-( E )-nonenal (HNE), and 4,272 μg/kg glycidyl ester. In contrast, the uncoated CFDC had 19.2% oil, 117.55 μg/kg acrylamide, 0.25 mg KOH/100 kg acid, 14.40 mmol/kg peroxide, p -anisidine value of 9.76, 0.63 μg/g malondialdehyde, 0.23 μg/g HHE, 0.86 μg/g HNE, and 5,758 μg/kg glycidyl ester. MC and soy protein isolate enhanced the oil barrier of the coating film, which effectively reduced the heat transfer coefficients, oil transfer, oil oxidation, and chemical hazards in the CFDC. Our work on this edible coating contributes to methods for control of oil and chemical hazards in fried foods.
研究领域:
食品科学
·
营养学
·
食品安全
✓ 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）