Camellia oil adulteration detection using fatty acid ratios and tocopherol compositions with chemometrics

To analyze the formation of fatty acid (FA) and trans fatty acids (TFAs) in camellia oil, the method of quantitative analysis of FA was investigated by gas chromatography (GC). 15 kinds of fatty acids methyl esters (FAMEs) standards have been referred; the database used for external and internal standard analysis method was established. The correlation coefficient (r2) of all the linear regression equations both external and internal standard curves were more than 0.99, the recovery of all FAMEs standards from 92.01% to 106.7%, the coefficient of variation (CV) of the intra-day from 2.966% to 6.302%. Five FA, i.e. C16:0, C18:0, C18:1-9c, C18:2-9c12c, C18:3-9c12c15c, have been discovered in raw camellia oil. The content was 8.732, 2.168, 81.44, 8.925 and 0.7299 g/100g, respectively. Six kinds of FA have been formatted, i.e. C16:0, C18:0, C18:1-9t, C18:1-9c, C18:2-9c12c, C18:3-9c12c15c in heated camellia oil (270oC, 1 h) with the content of 8.341, 2.101, 1.931, 71.72, 4.636, 0.4680 g/100g, respectively. These values suggested that an extensive change has been occurred in the formation of FA of camellia oil after heated.

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Prediction of fatty acid composition in camellia oil by 1H NMR combined with PLS regression

Food Chemistry ◽

10.1016/j.foodchem.2018.12.025 ◽

2019 ◽

Vol 279 ◽

pp. 339-346 ◽

Cited By ~ 15

Author(s):

MengTing Zhu ◽

Ting Shi ◽

Yi Chen ◽

ShuHan Luo ◽

Tuo Leng ◽

...

Keyword(s):

Fatty Acid Composition ◽

Fatty Acid ◽

Acid Composition ◽

1H Nmr ◽

Pls Regression ◽

Camellia Oil

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Evaluation of Glycidyl Fatty Acid Ester Levels in Camellia Oil with Different Refining Degrees

International Journal of Food Properties ◽

10.1080/10942912.2013.858351 ◽

2015 ◽

Vol 18 (5) ◽

pp. 978-985 ◽

Cited By ~ 3

Author(s):

Suijian Qi ◽

Huayong Chen ◽

Yang Liu ◽

Weifei Wang ◽

Liqiong Shen ◽

...

Keyword(s):

Fatty Acid ◽

Fatty Acid Ester ◽

Acid Ester ◽

Camellia Oil

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Improvements on the Phenylboronic Acid Derivatization Method in Determination of 3-monochloropropane Fatty Acid Esters in Camellia Oil by N-(n-propyl)ethylenediamine Solid Phase Extraction

Food Analytical Methods ◽

10.1007/s12161-020-01944-8 ◽

2021 ◽

Author(s):

Liqun Zhang ◽

Leyi Wu ◽

Pinggu Wu

Keyword(s):

Fatty Acid ◽

Solid Phase Extraction ◽

Solid Phase ◽

Phenylboronic Acid ◽

Fatty Acid Esters ◽

Phase Extraction ◽

Camellia Oil ◽

Acid Esters

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Temperature Dependence of the Critical Electron Dose for Fatty Acid Monolayers

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100053188 ◽

1982 ◽

Vol 40 ◽

pp. 78-79

Author(s):

Kenneth H. Downing ◽

Robert M. Glaeser

Keyword(s):

Electron Beam ◽

Fatty Acid ◽

Inelastic Scattering ◽

Temperature Dependence ◽

Structural Damage ◽

Direct Result ◽

Second Step ◽

Strong Temperature Dependence ◽

Electron Dose ◽

Covalent Bonds

The structural damage of molecules irradiated by electrons is generally considered to occur in two steps. The direct result of inelastic scattering events is the disruption of covalent bonds. Following changes in bond structure, movement of the constituent atoms produces permanent distortions of the molecules. Since at least the second step should show a strong temperature dependence, it was to be expected that cooling a specimen should extend its lifetime in the electron beam. This result has been found in a large number of experiments, but the degree to which cooling the specimen enhances its resistance to radiation damage has been found to vary widely with specimen types.

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Effect of light intensity on the ultrastructure of the filamentous cyanobacterium, Anabaena variabilis

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100103565 ◽

1988 ◽

Vol 46 ◽

pp. 300-301

Author(s):

C. S. Bricker ◽

S. R. Barnum ◽

B. Huang ◽

J. G. Jaworskl

Keyword(s):

Fatty Acid ◽

Light Intensity ◽

Acid Content ◽

Fatty Acid Content ◽

Anabaena Variabilis ◽

Chloroplast Envelope ◽

Major Constituent ◽

Filamentous Cyanobacterium ◽

Photosynthetic Membrane ◽

Effect Of Light

Cyanobacteria are Gram negative prokaryotes that are capable of oxygenic photosynthesis. Although there are many similarities between eukaryotes and cyanobacteria in electron transfer and phosphorylation during photosynthesis, there are two features of the photosynthetic apparatus in cyanobacteria which distinguishes them from plants. Cyanobacteria contain phycobiliproteins organized in phycobilisomes on the surface of photosynthetic membrane. Another difference is in the organization of the photosynthetic membranes. Instead of stacked thylakolds within a chloroplast envelope membrane, as seen In eukaryotes, IntracytopIasmlc membranes generally are arranged in three to six concentric layers. Environmental factors such as temperature, nutrition and light fluency can significantly affect the physiology and morphology of cells. The effect of light Intensity shifts on the ultrastructure of Internal membrane in Anabaena variabilis grown under controlled environmental conditions was examined. Since a major constituent of cyanobacterial thylakolds are lipids, the fatty acid content also was measured and correlated with uItrastructural changes. The regulation of fatty acid synthesis in cyanobacteria ultimately can be studied if the fatty acid content can be manipulated.

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The effects of low-ratio n-6/n-3 PUFA on biomarkers of inflammation: a systematic review and meta-analysis

Food & Function ◽

10.1039/d0fo01976c ◽

2021 ◽

Author(s):

Yali Wei ◽

Yan Meng ◽

Na Li ◽

Qian Wang ◽

Liyong Chen

Keyword(s):

Systematic Review ◽

Fatty Acid ◽

Polyunsaturated Fatty Acid ◽

Meta Analysis ◽

Chain Polyunsaturated Fatty Acid ◽

Inflammation Markers ◽

Pufa Supplementation ◽

Long Chain

The purpose of the systematic review and meta-analysis was to determine if low-ratio n-6/n-3 long-chain polyunsaturated fatty acid (PUFA) supplementation affects serum inflammation markers based on current studies.

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