scholarly journals Fatty Acid Composition of Heliotropium Species (Boraginaceae): A First Chemical Report on the New Species H. Thermophilum

2008 ◽  
Vol 3 (10) ◽  
pp. 1934578X0800301 ◽  
Author(s):  
Ahmet C. Gören ◽  
Gülendam Tümen ◽  
Ali Çelik ◽  
Simay Çıkrıkçı
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Fatty Acid Methyl Esters ◽  
Methyl Esters ◽  
Minor Component ◽  
Seed Oils ◽  
Main Fatty Acid ◽  
A Minor ◽  
Fatty Acid Compositions

Fatty acid compositions of the seed oils of H. thermophilum Kit Tan, A. Celik & Y. Gemici, sp. nova, H. europaeum L., and H. hirsutissimum L. (Boraginaceae) were analyzed by GC/MS. The main fatty acid methyl esters were determined to be of palmitic (39.8–40.6%), linoleic (32.4–33.2%), oleic (10.6–12.1%) and stearic acids (7.9–8.5%). γ-Linolenic acid was found to be a minor component of the seed oils of the reported species. This is the first chemical report on the fatty acid composition of H. thermophilum, along with chemotaxonomic evaluation of the species.

Fatty Acid Composition of Some Ranunculaceae Seed Oils

1996 ◽  
Vol 51 (3-4) ◽  
pp. 151-154 ◽  
Author(s):  
Eugène Ucciani ◽  
Alain Debal ◽  
Michel Gruber ◽  
Robert L. Wolff
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Linolenic Acid ◽  
Acid Composition ◽  
Fatty Acid Methyl Esters ◽  
Methyl Esters ◽  
Gas Liquid Chromatography ◽  
Seed Oils ◽  
Gamma Linolenic Acid ◽  
Capillary Gc

Abstract The fatty acid composition of seed oils of eight Ranunculaceae was determinated in order to characterize new sources of gamma-linolenic acid. Fatty acids were identified as fatty acid methyl esters (FAME) by capillary gas-liquid chromatography (GC) and capillary GC-Fourier transform infrared spectroscopy (FTIR). For trienic FAME the use of a cyanopropyl-polysiloxane stationary phase (CP-Sil 88) allowed the separation with high resolution of methyl ester of columbinic acid (trans-5,cis-9,cis-12 18:3) and gamma-linolenic acid (cis-6,cis-9,cis-12 18:3). The results confirmed the presence of columbinic acid in Thalictrum seed oils, and that of gamma-linolenic acid in Anemone and related species seed oils. The taxonomic subdivision of Ranunculaceae into sub-families and tribes, which resulted from morphological considerations, did not account for the above results.

Chloroplast Fatty Acid Composition in Mediterranean Populations of the Marine Chlorophyte, Anadyomene stellata

2000 ◽  
Vol 55 (7-8) ◽  
pp. 569-575 ◽  
Author(s):  
Debra L. Bemis ◽  
Vassilios Roussis ◽  
Constantinios Vagias ◽  
Robert S. Jacobs
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Fatty Acid Methyl Esters ◽  
Methyl Esters ◽  
Florida Keys ◽  
Mediterranean Populations ◽  
Total Fatty Acids ◽  
Of Greece

Abstract Chloroplasts isolated from three populations of the tropical marine Chlorophyte Anadyomene stellata collected off the coast of Greece were analyzed for their fatty acid composition. Following the preparation of fatty acid methyl esters, GC-MS (El) was utilized to identify the fatty acids present in each population. Including isomers, the fatty acid profile of all three algal populations was comprised of 19 fatty acids (4 saturated, 6 monounsaturated, 9 polyunsaturated) with palmitic acid present in the highest amounts (25-27% of total fatty acids). Analysis of variance revealed significant differences amongst the three populations in the percent of total fatty acids for twelve of the fatty acids. High levels of C20 PUFAs, an atypical observation in Chlorophytes, were observed in all three populations comprising approximately 17% of total fatty acids. Furthermore a 14:2 PUFA , apparently rare in marine macrophytic Chlorophytes, was identified in significant quantities. Surprisingly, we did not find any of the conjugated tetraene containing fatty acids that we previously identified in the A. stellata populations studied from the Florida Keys.

scholarly journals Application of the “fast” gas chromatography method for regular analysis of fatty acids in milk and dairy products

2020 ◽  
Vol 82 (1) ◽  
pp. 164-168
Author(s):  
N. A. Zhizhin
Keyword(s):  
Fatty Acids ◽  
Gas Chromatography ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Stationary Phase ◽  
Acid Composition ◽  
Fatty Acid Methyl Esters ◽  
Methyl Esters ◽  
Analysis Time ◽  
Acid Methyl

The paper presents one of the approaches for identifying fatty acids using gas chromatography, which significantly reduces the analysis time, and is equally effective when compared with the traditional method of studying the fatty acid composition. The determination of the composition of fatty acids today is a guarantee of quality in identifying various conformations and modifications of milk fat, the bioactive properties of individual acids of the omega-3 and omega-6 families, etc. Moreover, this method is time-consuming, therefore, the goal of this work is to optimize the parameters of this methodology for quick and regular analysis of fatty acid composition in laboratories and dairy enterprises. The analysis of the fatty acid composition was carried out using two columns with different stationary phases. A comparative evaluation of the analytical characteristics was carried out on two capillary chromatographic columns: SP-2560 100 ? 0.25 mm ID, 0.2 ?m with a stationary phase FFAP (traditional) and a gas chromatographic column BPX-70: stationary phase 70% cyanopropylphenyl dimethylpolysiloxane, 10 m ? 0.1 m ? 0.20 ?m. Detection was carried out using a flame ionization detector. A mixture of Supelco® 37 FAME Mix fatty acid methyl esters and Sigma-Aldrich methyl decanoate analytical standard was used as the standard. For data processing, the NetChrom software was used, the composition of fatty acid methyl esters was calculated by the internal normalization method. The analysis time of the first column was 49.07 minutes, for the second 8.44, respectively. The use of a stationary phase column of cyanopropylphenyl dimethylpolysiloxane significantly reduced the analysis time when eluting a complex composition of fatty acids. The studies were carried out using modern analytical techniques and arbitration methods of analysis in the laboratory of technochemical control of the All-Russian Scientific Research Institute of the Dairy Industry. This adapted analysis method will be of interest to specialists in the field of laboratory research and processing enterprises.

scholarly journals Temperature and Aging Affect Glyphosate Toxicity and Fatty Acid Composition in Allonychiurus kimi (Lee) (Collembola)

Toxics ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 126
Author(s):  
June Wee ◽  
Yun-Sik Lee ◽  
Yongeun Kim ◽  
Jino Son ◽  
Kijong Cho
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Aging Time ◽  
Acid Composition ◽  
Chronic Effect ◽  
Residual Concentration ◽  
Significant Toxicity ◽  
Collembolan Species ◽  
Glyphosate Degradation ◽  
Fatty Acid Compositions

Glyphosate is the most used herbicide worldwide, but enormous use of glyphosate has raised concerned about its environmental loadings. Although glyphosate is considered non-toxic, toxicity data for soil non-target organisms according to temperature and aging are scarce. This study examined the toxicity of glyphosate with the temperature (20 °C and 25 °C) and aging times (0 day and 7 days) in soil using a collembolan species, Allonychiurus kimi (Lee). The degradation of glyphosate was investigated. Fatty acid composition of A. kimi was also investigated. The half-life of glyphosate was 2.38 days at 20 °C and 1.69 days at 25 °C. At 20 °C with 0 day of aging, the EC50 was estimated to be 93.5 mg kg−1. However, as the temperature and aging time increased, the glyphosate degradation increased, so no significant toxicity was observed on juvenile production. The proportions of the arachidonic acid and stearic acid decreased and increased with the glyphosate treatment, respectively, even at 37.1 mg kg−1, at which no significant effects on juvenile production were observed. Our results showed that the changes in the glyphosate toxicity with temperature and aging time were mostly dependent on the soil residual concentration. Furthermore, the changes in the fatty acid compositions suggest that glyphosate could have a chronic effect on soil organisms.

scholarly journals An effective GC method for the determination of the fatty acid composition in silkworm pupae oil using a two-step methylation process

2015 ◽  
Vol 80 (1) ◽  
pp. 9-20 ◽  
Author(s):  
Jun Wang ◽  
Weiwei Wu ◽  
Xudong Wang ◽  
Min Wang ◽  
Fuan Wu
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Methyl Esters ◽  
Superior Performance ◽  
Step Procedure ◽  
Silkworm Pupae ◽  
Chromatographic Procedure ◽  
One Step ◽  
Synthesis Yield

In search of an accurate and effective method to determine fatty acid composition in silkworm pupae oils, five methylation methods were evaluated for use in the gas chromatographic (GC) quantitation of fatty acid methyl esters (FAMEs), including one-step esterification catalyzed by an acidic (H2SO4 and BF3) or alkali catalyst (KOH and NaOCH3) and a two-step procedure catalyzed successively by KOH and H2SO4. These methods were comparatively adopted to quantify FAMEs in silkworm pupae oil using GC-MS and GC and then validate their precision, stability and average recovery rates. The results indicated that compared with the other four methyl esterification methods, two-step methylation effectively improves the synthesis yield of FAMEs, conserves agents, and eliminates the usage of potential harmful reagents. The proposed GC method has been validated, shows good accuracy and precision, and has been applied successfully to the quantification of FAMEs in several varieties of silkworm pupae oils. The short analytical run time leads to low costs and a fast chromatographic procedure. In summary, two-step pretreatment had superior performance, providing technical references for the determination and analysis of fatty acids in other oils.

Comparative analysis of the fatty acid composition of deep-water Baikal amphipods

Crustaceana ◽  
2019 ◽  
Vol 92 (1) ◽  
pp. 57-72
Author(s):  
Selmeg V. Bazarsadueva ◽  
Larisa D. Radnaeva ◽  
Arnold K. Tulokhonov
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Lake Baikal ◽  
Deep Water ◽  
Monounsaturated Fatty Acids ◽  
Manned Submersible ◽  
Main Fatty Acid ◽  
Low Levels

Abstract In this report, we have compared the fatty acid composition of the endemic Lake Baikal amphipods Ommatogammarus albinus (Dybowsky, 1874) and Parapallasea lagowskii (Dybowsky, 1874). Specimens were sampled using the deep-water manned submersible “Mir” at the oil-methane seeps of Cape Gorevoy Utes and at a hydrothermal vent in Frolikha Bay. High levels of monounsaturated fatty acids and relatively low levels of saturated and polyunsaturated fatty acids were detected in the studied amphipods, with oleic and palmitic acid representing the main fatty acid components. The habitat of the amphipods exerted a profound effect on their fatty acid profile: the amphipods of Gorevoy Utes contained higher levels of linolenic 18:3n3 and arachidonic 20:4n6 acids, while the amphipods of Frolikha Bay contained higher levels of eicosapentaenoic 20:5n3 and docosahexaenoic 22:6n3 acid. Based on these findings, we suggest that the amphipods’ diet in different areas of Lake Baikal determines their fatty acid composition.

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