GC-FID- and Acyl Carbon Number-Based Determination of Characteristic Groupings of Complex Triglyceride (Benefat S and Other) Mixtures

2000 ◽  
Vol 48 (3) ◽  
pp. 785-791 ◽  
Author(s):  
John P. Jasper
Keyword(s):  
Carbon Number ◽  
Acyl Carbon Number ◽  
Acyl Carbon

scholarly journals Comparative Analysis of Triglycerides From Different Regions and Mature Lactation Periods in Chinese Human Milk Project (CHMP) Study

2021 ◽  
Vol 8 ◽  
Author(s):  
Huiquan Zhu ◽  
Aimei Liang ◽  
Xiaodan Wang ◽  
Wenyuan Zhang ◽  
Yumeng Zhang ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Double Bond ◽  
Human Milk ◽  
Infant Formula ◽  
Carbon Number ◽  
Acyl Carbon Number ◽  
Mature Milk ◽  
Chinese Cities ◽  
Acyl Carbon ◽  
Milk Samples

The kinds and proportions of triglycerides of human mature milk play an independent role in the growth of infants. In this study, the human milk samples obtained from eight different Chinese cities (Chengdu, Weihai, Lanzhou, Jinhua, Beijing, Guangzhou, Zhengzhou, and Harbin) and six sequential mature lactation times (30, 60, 90, 120, 150, and 180 days) were detected for the triglycerides. The result demonstrated that total 66 triglycerides were detected in mature human milk, with acyl carbon number (ACN) numbers were locating in the range of 34–54 and double bond (DB) numbers were locating in the range of 0–6. In addition, the percentage of OPO, OPL, and OOO was relatively higher than others, accounted for more than 4% of total triglycerides in all the lactation areas and times, and the percentage of U2S and LLL triglycerides was also richest in mature milk. Furthermore, it was obvious that lactation regions had more significant effect on the triglycerides compared with lactation time and the triacylglycerols (TAGs) of human milk in Guangzhou were clearly different from that in other regions. Therefore, the results of this study will provide data reference for the design of infant formula suitable for Chinese babies.

Effects of experimental conditions on the determination of the effective carbon number

2003 ◽  
Vol 57 (9-10) ◽  
pp. 639-644 ◽  
Author(s):  
M. Kállai ◽  
V. Máté ◽  
J. Balla
Keyword(s):  
Carbon Number ◽  
Experimental Conditions

A Method for the Determination of the Structure of Saturated Branched-Chain Fatty Acids

1959 ◽  
Vol 12 (4) ◽  
pp. 657 ◽  
Author(s):  
KE Murray
Keyword(s):  
Fatty Acids ◽  
Carbon Number ◽  
Carbon Chain ◽  
Octadecanoic Acid ◽  
Cyclopropane Fatty Acids ◽  
Branched Chain Fatty Acids ◽  
Tuberculostearic Acid ◽  
Branched Chain ◽  
Chain Fatty Acids

A method is described for the determination of the structure of branched-chain fatty acids. It is found that the carbon chain of methyl-branched acids can be readily degraded by potassium permanganate in acetone, to give a series of acids of decreasing carbon number. Where a branch occurs the acid series is interrupted and a methyl ketone, of the same carbon number as a missing acid, is produced. Gas chromatographic examination of the ketone(s) and esterified acids gives clear evidence for the location of the branch(es). The method is illustrated by application to tuberculostearic acid (10-methyl-octadecanoic acid) and C27-phthianoic acid (2,4,6-trimethyltetracosanoic acid). It appears also able to decide the location of the ring in cyclopropane fatty acids.

Determination of average carbon number of petroleum waxes by X-ray diffraction

2008 ◽  
Vol 41 (5) ◽  
pp. 950-951 ◽  
Author(s):  
Sanat Kumar ◽  
S. P. Srivastava ◽  
H. U. Khan
Keyword(s):  
Melting Point ◽  
Long Range ◽  
Carbon Number ◽  
High Melting ◽  
X Ray Diffraction ◽  
High Melting Point ◽  
X Ray ◽  
Long Range Ordering ◽  
Standard Gas

Eight petroleum waxes, both paraffin as well as microcrystalline, have been analysed by X-ray diffraction. The average carbon number has been estimated by the long-range ordering observed in the diffractograms of these waxes. The average carbon number has also been determined following the standard gas chromatographic (GC) method. The results obtained by X-ray diffractometry compare well with those obtained by the GC method. The former method also permits determination of the average carbon number of high melting point waxes, which is otherwise difficult using GC.

Resolution of alkenylacylglycerol moieties of natural glycerophospholipids by gas–liquid chromatography on polar capillary columns

1984 ◽  
Vol 62 (6) ◽  
pp. 352-362 ◽  
Author(s):  
J. J. Myher ◽  
A. Kuksis
Keyword(s):  
Liquid Chromatography ◽  
Carbon Number ◽  
Glass Capillary Column ◽  
Gas Liquid Chromatography ◽  
Glass Capillary ◽  
Practical Procedure ◽  
Flame Ionization ◽  
Column Wall ◽  
Layer Chromatography

A sensitive and practical procedure has been developed for the determination of the sn-1-alk-1-enyl-2-acylglycerol moieties of natural glycerophospholipids using capillary gas–liquid chromatography with flame ionization detection. The method gives excellent resolution and quantitative estimates for molecular species according to carbon number and degree of unsaturation. The diradylglycerols are released from the glycerophospholipids by hydrolysis with phospholipase C and the alk-1-enylacylglycerols are resolved by thin-layer chromatography. Either the trimethylsilyl or the tertiary-butyldimethylsilyl ethers are then resolved at 250 °C by gas–liquid chromatography on a glass capillary column wall-coated with a polar cyanopropylsiloxane polymer using hydrogen as the carrier gas. The method has been applied to the analysis of the alk-1-enylacyl- and diacyl-glycerol moieties of the phosphatidylethanolamines of rat heart and kidney.

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