scholarly journals Secondary Metabolites of the Cuticular Abdominal Glands of Variegated Grasshopper (Zonocerus variegatus L.)

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
O. U. Igwe ◽  
D. E. Udofia
Keyword(s):  
Methyl Ester ◽  
Octadecenoic Acid ◽  
Acid Methyl Ester ◽  
Chemical Compounds ◽  
Gas Chromatography Mass Spectrometry ◽  
Zonocerus Variegatus ◽  
Acid Methyl ◽  
Tridecanoic Acid ◽  
Ft Ir ◽  
Ir Analysis

Chemical compounds were extracted with petroleum ether from the cuticular abdominal glands of grasshopper (Zonocerus variegatus L.) and eleven compounds were characterised using Gas Chromatography/Mass Spectrometry (GC/MS) technique in combination with Fourier Transform-Infrared Spectroscopy (FT-IR). The compounds analysed were 2,7-dimethyloctane (3.21%), decane (5.33%), undecane (3.81%), tridecanoic acid methyl ester (4.76%), hexadecanoic acid (9.37%), 11-octadecenoic acid methyl ester (23.18%), pentadecanoic acid, 14-methyl-methyl ester (4.43%), (Z)-13-docosenoic acid (10.71%), dodecyl pentafluoropropionate (9.52%), 2-dodecyl-1,3-propanediol (6.38%), and 1,12-tridecadiene (19.30%). FT-IR analysis of the extract showed peaks at 1270.17 (C–O and C–F), 1641.48 (C=C), 2937.68 (C–H), and 3430.51 (O–H) cm−1 indicating the presence of ether, alkene, alkane, alcohol, carboxylic acid, and fluoric compounds. These compounds consisted of 32.37% ester, 31.65% hydrocarbons, 20.08% fatty acid, 9.52% halogenated ester, and 6.38% alcohol. The highest component was 11-octadecenoic acid methyl ester followed by 1,12-tridecadiene. Since behavioural bioassays were not carried out, the consideration of these compounds to be pheromone semiochemicals remains a hypothesis.

scholarly journals Evaluation of 3-Methylbutanoic Acid Methyl Ester as a Factor Influencing Flavor Cleanness in Arabica Specialty Coffee

2021 ◽  
Vol 11 (12) ◽  
pp. 5413
Author(s):  
Keiko Iwasa ◽  
Harumichi Seta ◽  
Yoshihide Matsuo ◽  
Koichi Nakahara
Keyword(s):  
Methyl Ester ◽  
Methyl Esters ◽  
Acid Methyl Ester ◽  
Chemical Compounds ◽  
Gas Chromatography Mass Spectrometry ◽  
Arabica Coffee ◽  
Acid Methyl ◽  
Coffee Brew ◽  
Coffee Beans ◽  
Specialty Coffee

This paper reports on the chemical compounds in arabica coffee beans with a high Specialty Coffee Association (SCA) cupping score, especially those in specialty coffee beans. We investigated the relationship between the chemical compounds and cupping scores by considering 16 types of Coffea arabica (arabica coffee) beans from Guatemala (SCA cupping score of 76.5–89.0 points). Non-targeted gas chromatography-mass spectrometry-based chemometric profiling indicated that specialty beans with a high cupping score contained considerable amounts of methyl-esterified compounds (MECs), including 3-methylbutanoic acid methyl ester (3-MBM), and other fatty acid methyl esters. The effect of MECs on flavor quality was verified by spiking the coffee brew with 3-MBM, which was the top-ranked component, as obtained through a regression model associated with cupping scores. Notably, 3-MBM was responsible for the fresh-fruity aroma and cleanness of the coffee brew. Although cleanness is a significant factor for specialty beans, the identification of compounds that contribute to cleanness has not been reported in previous research. The chemometric profiling approach coupled with spiking test validation will improve the identification and characterization of 3-MBM commonly found in arabica specialty beans. Therefore, 3-MBM, either alone or together with MECs, can be used as a marker in coffee production.

scholarly journals Sandalwood, an Indian medicinal plant attenuates the microbial growth and influence up/down regulation of the metabolites

2021 ◽  
Author(s):  
Romana Parveen ◽  
Tooba Naz Shamsi ◽  
Sadaf Fatima
Keyword(s):  
Methyl Ester ◽  
Octadecenoic Acid ◽  
Acid Methyl Ester ◽  
Gas Chromatography Mass Spectrometry ◽  
Hexadecanoic Acid ◽  
Trimethylsilyl Ester ◽  
E Coli ◽  
Acid Methyl ◽  
Soxhlet Apparatus ◽  
Antibacterial Assay

AbstractThe methanolic extract of sandalwood (SwME) was prepared by soxhlet apparatus and the antibacterial assay was performed. Further, the metabolite profiling of SwME and lysates of E. coli and E. coli grown in the presence of SwME was generated. SwME showed maximum inhibition against E. coli (MTCC 443) i.e. 82.71%, and minimal against B. subtilis (MTCC 736) i.e. 26.82%. The metabolome profiles of E. coli and SwME were generated using gas chromatography-mass spectrometry (GC-MS) technique. Comparative studies were done to understand to what extent metabolite modifications differ between SwME, E. coli lysate and the E. coli strain grown in presence of extract. Result revealed 23 peaks with major compounds present in E. coli were 9-Octadecenoic Acid (Z)-, Methyl Ester (26.85%), Hexadecanoic Acid, methyl ester (20.5%) and Hexadecanoic acid, trimethylsilyl ester (15.79%). When E. coli was grown in the presence of SwME, GC-MS analysis showed 25 peaks with major compounds such as 9-Octadecenoic Acid, Methyl Ester (21.97%), Hexadecanoic Acid, Methyl Ester (17.03%), and Hexadecanoic Acid, Trimethylsilyl Ester (14.96%). Correlating the metabolic profiles with the changes occurring is essential to progression their comprehension and in the development of new approaches to identify the metabolomics regulation in E. coli in response to SwME.

scholarly journals Gas Chromatography-Mass Spectrometry (GC-MS) Analysis of Ajwain (Trachyspermum ammi) Seed Extract

2020 ◽  
Vol 11 (02) ◽  
pp. 228-231
Author(s):  
Basheer Mohammed Abdullah ◽  
Mansour Abdulnabi Hadi Mehdi ◽  
Abdul Raoof Khan ◽  
Jiyaullakhan Maulakhan Pathan
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Methyl Ester ◽  
Volatile Compounds ◽  
Octadecenoic Acid ◽  
Acid Methyl Ester ◽  
Seed Extract ◽  
Gas Chromatography Mass Spectrometry ◽  
Acid Methyl ◽  
Trachyspermum Ammi

The objectives of this research were to determine the chemical composition of the extract of Trachyspermum ammi L. seeds by using gas chromatography-mass spectrometry analysis (GC-MS). The GC-MS is a matchless method for the study and measuring quantity of organic volatile and semi-volatile compounds. Gas chromatography is employed to separates mixtures into individual components employing a temperature-controlled capillary column. Mass spectrometry is utilized to recognize a variety of components from their mass spectra. In the present study, volatile/ semi-volatile compounds present in Ajwain seed extract were analyzed. Ajwain seed extract is extracted by soxhlet extraction method and then analyzed by GC-MS. Total of nine compounds were found and quantified in this study. The major bioactive compounds in Ajwain seed extract are 3,5-dimethylanisole (83.19%), 6-octadecenoic acid, methyl ester, (Z)-, 7-octadecenoic acid, methyl ester (7.42%), and 2-cyclohexyl-2,5-cyclohexadiene-1,4-dione, 4-oxime (3.01%).

scholarly journals ANTIDIABETES ACTIVITIES EXTRACT HEXANE FROM THE PEELS OF ARTOCARPUS CAMANSI BLANCO FRUIT

2018 ◽  
Vol 11 (13) ◽  
pp. 12
Author(s):  
Rosnani Nasution ◽  
Chairani Nur Fitrah ◽  
Hira Helwati ◽  
Murniana Murniana ◽  
Bastian Arifin ◽  
...  
Keyword(s):  
Blood Glucose ◽  
Methyl Ester ◽  
Crude Extract ◽  
Octadecenoic Acid ◽  
Acid Methyl Ester ◽  
Gas Chromatography Mass Spectrometry ◽  
Hexadecanoic Acid ◽  
Activity Test ◽  
Acid Methyl ◽  
Test Result

 Objective: The purpose of this research is to know the chemical compound from the n-hexane extract of Kulu (Artocarpus camansi Blanco) fruit peels and to know its antidiabetes activity against male Swiss Webster mice.Methods: Samples were macerated with n-hexane solvent, then the extracts were obtained, was characterization with gas chromatography-mass spectrometry (GC-MS), and then the extract separated by column chromatography. The results obtained were tested by antidiabetes action with glucose tolerance method.Results: Anti-diabetic activity test result showed that the most active sample to decrease the blood glucose of mice was n-hexane crude extract, at minute 90th, activeness was 65.59%, compared to glibenclamide, then group of fraction A, at minute 90th, activeness 65.58% compared glibenclamide, whereas isolate D11, its activity is 60.11% and 60.12%, at minute 60th and 90 min compared to glibenclamide. Concentrated extracts were characterized by GC-MS, shows the major compounds are hexadecanoic acid methyl ester (30.14%), 9,12-octadecadienoyl chloride, (Z, Z) - (8.44%) and 9-octadecenoic acid, methyl ester (30,91%) also were obtained a compound like an β-amyrin acetate.Conclusion: The most active sample to decrease the blood glucose of mice was n-hexane crude extract, and the major compounds are hexadecanoic acid methyl ester (30.14%), 9,12-octadecadienoyl chloride, (Z, Z) - (8.44%) and 9-octadecenoic acid, methyl ester (30.91%).

scholarly journals Characterization of Bioactive Sesquiterpenes, Organic Acids and Their Derivatives from the Leaves of Psidium guajava Linn

2014 ◽  
pp. 456-467
Author(s):  
Okenwa U. Igwe ◽  
T. Abii
Keyword(s):  
Mass Spectrometry ◽  
Methyl Ester ◽  
Octadecenoic Acid ◽  
Acid Methyl Ester ◽  
Psidium Guajava ◽  
Gas Chromatography Mass Spectrometry ◽  
Hexadecanoic Acid ◽  
Acid Methyl ◽  
Phytochemical Compounds

The isopropanolic extract of the leaves of Psidium guajava Linn was analyzed by Gas chromatography-mass spectrometry (GC-MS). Fourteen different phytochemical compounds have been characterized, including 1, 3, 3-trimethyl-2-oxabicyclo [2.2.2] octane, (2.06%), 4, 11, 11-trimethyl-bicyclo [7.2.0] undec-4-ene (6.26%), (E,E,E)-2, 6, 6, 9-tetramethyl-1, 4, 8-cycloundecatriene (1.05%), eudesma-4(14),11-diene (5.07%), guaia-1(10), 11-diene (4.63%), 3, 7, 11-trimethyl-1,6,10-dodecatriene-3-ol(4.01%), 1,3-dimethyl-8-(1-methylethyl)-tricyclo [4.4.0.0(2,7)] dec-3-ene (1.66%), 1, 1, 4, 7-tetramethyl-decahydro-1H-cycloprop[e] azulen-4-ol (11.00%), hexadecanoic acid methyl ester (1.53%), 4, 4, 8-trimethyltricyclo [6.3.1.0(1,5)] dodecane-2, 9-diol (2.78%), L-(+)-ascorbic acid 2,6-dihexadecanoate (20.43%), 7-octadecenoic acid methyl ester (3.81%), 3, 7, 11, 15-tetramethyl-2-hexadecen-1-ol (2.24%) and 9-octadecenoic acid (33.47%). The presence of these bioactive compounds in the leaves of Psidium guajava Linn could be the reason behind its use for the treatment of diseases and infections in herbal medicine in Nigeria.  

scholarly journals Phytochemical Profiling and Larval Control of Erythrina variegata Methanol Fraction against Malarial and Filarial Vector

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Mathalaimuthu Baranitharan ◽  
Barbara Sawicka ◽  
Jayapal Gokulakrishnan
Keyword(s):  
Methyl Ester ◽  
Methanol Extract ◽  
Mosquito Control ◽  
Chemical Constituents ◽  
Octadecenoic Acid ◽  
Acid Methyl Ester ◽  
Methanol Fraction ◽  
Mass Spectral ◽  
Erythrina Variegata ◽  
Acid Methyl

Erythrina variegata (E. variegata) bioactive chemical has been the potential to be utilized as a good, eco-friendly approach for the control of mosquito population. In the present investigation, methanol extract using insecticidal compounds isolated against mosquito larvae kill assay was carried out. Secondary metabolism was characterized by thin layer chromatography, column chromatography, Fourier transform-infrared spectroscopy, gas chromatography-mass spectral, and identification of compound. Mosquito immature third instar larval, Anopheles stephensi, and Culex quinquefasciatus have been exposed to different concentrations of 50-250 µg/ml. Totally, larvae were death rate 98.2% (significant value 0.001b) from methanol extract and it is significant toxicity against larvae of An. stephensi and Cx. quinquefasciatus with LC50/LC99 values were 157.69/339.55 µg/ml and 137.67/297.33 µg/ml, respectively. FT-IR analysis in the functional groups such as alcohol, amines, amides, alkenes, 1⁎ amines, aromatic amines, aliphatic amines, 1⁎,2⁎ amines, and alkyl halides searched the identity of secondary metabolites, which may act as 12-Octadecenoic acid, methyl ester compound and clearly indicates being phytochemical. Chemical constituents of twenty-five compounds were identified in the methanol extract. The major components were 12-Octadecenoic acid and methyl ester (37.31%). Compound molecules consist of carbon 19 atoms (gray), hydrogen 36 atoms (greenish blue), and oxygen 2 atoms (red), indicated by the different colors. The results were obtained suggesting that, in addition to their pharmaceutical and medicine sources, 12-Octadecenoic acid, methyl ester compound can also serve as a natural mosquito control.

Fatty Acid Composition of Seeds of Satureja thymbra and S. cuneifolia

2003 ◽  
Vol 58 (7-8) ◽  
pp. 502-504 ◽  
Author(s):  
Ahmet C. Gören ◽  
Gökhan Bilsel ◽  
Mehmet Altun ◽  
Fatih Satıl
Keyword(s):  
Fatty Acid ◽  
Methyl Ester ◽  
Methyl Esters ◽  
Octadecenoic Acid ◽  
Acid Methyl Ester ◽  
Octadecatrienoic Acid ◽  
Octadecanoic Acid ◽  
Hexadecanoic Acid ◽  
Acid Methyl ◽  
Main Components

Abstract The chemical composition of fatty acid methyl esters (FAMEs) from seeds of S. thymbra and S. cuneifolia were analyzed by GC/MS. 7 FAMEs were identified from the seeds of S. thymbra mainly as 9-octadecenoic acid methyl ester (43.9%), hexadecanoic acid methyl ester (11.4%), 9,12,15-octadecatrienoic acid methyl ester (Z,Z,Z) (30.2%), and octadecanoic acid methyl ester (14.1%), while from the seed of S. cuneifolia 10 FAMEs were obtained with the main components, similar to S. thymbra. These were identified as 9-octadecenoic acid methyl ester (10.1%), hexadecanoic acid methyl ester (methyl palmitate, 34.6%), 9,12,15-octadecatrienoic acid methyl ester (Z,Z,Z) (6.3%) and octadecanoic acid methyl ester (1.8%).

Analysis of Main Flavor Substances of Low- and Full-Fat Cheese Fermented by Lactobacillus acidophilus during Ripening Process

2011 ◽  
Vol 236-238 ◽  
pp. 2395-2398
Author(s):  
Rui Xiang Zhao ◽  
Cui Qing Hu ◽  
Sheng Yang Niu ◽  
Hua Di Sun ◽  
Xiao Hong Ge
Keyword(s):  
Methyl Ester ◽  
Lactobacillus Acidophilus ◽  
Mass Fraction ◽  
Octadecenoic Acid ◽  
Acid Methyl Ester ◽  
Streptococcus Thermophilus ◽  
Relative Mass ◽  
Low Fat ◽  
Acid Methyl ◽  
Low Fat Cheese

Low- and full-fat cheeses were fermented by Lactobacillus acidophilus and adjunct cultures Streptococcus thermophilus. After ripening for 90d at 4°C, the main flavor substances were determined by gas chromatograph. The results showed that more than 28 main flavor components were founded in full-fat cheese, and at least 19 were founded in low-fat cheese. In low-fat cheese, there was a higher content of 9-(Z)- octadecenoic acid and 10-hydroxy-octanoic acid methyl ester, which their relative mass fraction were 19.20% and 18.79% respectively. In full-fat cheese, there was a higher content of hexadecanoic acid methyl ester and 9-Octadecenoic acid(Z)-methyl ester, which their relative mass fraction were 24.27%and 23.37% respectively.

scholarly journals Isoprenoids and Fatty Acids Derivatives from the Chloroform Fraction of the Antimycobacterial Methanol Extract Ximeniaamericana Lam. (Olacaceae) Stem Bark

2019 ◽  
Vol 6 (2) ◽  
pp. 101-106
Author(s):  
Ozadheoghene Eriarie Afieroho ◽  
L. Lawson ◽  
Nnamdi Emenyonu
Keyword(s):  
Fatty Acids ◽  
Mycobacterium Tuberculosis ◽  
Methyl Ester ◽  
Palmitic Acid ◽  
Methanol Extract ◽  
Octadecenoic Acid ◽  
Acid Methyl Ester ◽  
Stem Bark ◽  
Clinical Strains ◽  
Acid Methyl

This study investigated the triterpenoids and fatty acid derivatives, and the in vitro growth inhibitory effect against clinical strains of Mycobacteria tuberculosis of the stem bark of Ximenia Americanaa plant widely used in ethno-medicine for the treatment of bacterial and skin infections, poison, post-partum hemorrhage, anaemia, and dysentery. The macerated methanol extract (XAM) of the stem bark was evaluated for anti-tuberculosis activity using the Lowensten Jensen method against de-contaminated clinical strains of Mycobacterium tuberculosis. The XAM was fractionated by open column chromatography on a normal phase silica gel column with a 25 % stepwise gradient of chloroform-methanol as mobile phase. The constituents of the non-polar column fractions eluted with 100% chloroform were characterized using Gas Chromatography-Mass spectroscopic (GC-MS) techniques and by comparison with reference NIST library compound. The XAM (5 mg/mL) inhibited the growth of the Mycobacterium tuberculosis. GC-MS analysis of the non-polar column fractions afforded Two lupane-type triterpenoids: Lup-20-(29)-en-3-one (15) and lupeol (16), three phytosteroids: campesterol (11), stigmasterol (12) and gamma-sitosterol (14), one fridelane-type triterpenoid: Friedelan-3-one (8), one oleanane-type triterpenoid: 12-oleanen-3-one (13), and the fatty acids: Palmitic acid methyl ester (1), Palmitic acid (2), 11-octadecenoic acid methyl ester (3), Octadecanoic acid methyl ester (4), Cis-13-Octadecenoic acid (5), 10,13-octadecadiynoic acid methyl ester (6), Docosanoic acid (7), Tetracosanoic acid (9), and Hexacosanoic acid methyl ester (10). The presence of these bioactive triterpenoids and fatty acids could offer an explanation for the ethno-medicinal uses of this plant. Further work is on-going to isolate in pure form, and characterized the bioactive constituents in the XAM with the view of discovery lead compounds for the treatment of tuberculosis and associated opportunistic bacterial infections.  

scholarly journals Profil GCMS Senyawa Kimia Ekstrak Metanol Isolat Cendawan Entomopatogen Beauveria Bassiana Dan Akar Cabai Sebagai Pemacu Pertumbuhan Cabai

2020 ◽  
Vol 4 (2) ◽  
pp. 106-118
Author(s):  
Magdalena Saragih ◽  
Trizelia Trizelia ◽  
Nurbailis Nurbailis ◽  
Yusniwati Yusniwati
Keyword(s):  
Acetic Acid ◽  
Methyl Ester ◽  
Palmitic Acid ◽  
Chemical Compound ◽  
Entomopathogenic Fungus ◽  
Acid Methyl Ester ◽  
Chemical Compounds ◽  
Hexadecanoic Acid ◽  
Ethanoic Acid ◽  
Acid Methyl

The aim of this study was to identify the chemical compound methanol extract of entomopathogenic fungus Beauveria bassiana from insect walang sangit and the chemical compound roots of red chili plants that were able to stimulate the growth of chilli plants after being applied with entomopathogenic fungus   B. bassiana through seed immersion inoculation using GCMS method. The chemical compound identified as a growth booster in   B. bassiana fungus isolates from the insect walang sangit is an Acetic acid Ethanoic acid Ethylic acid Glacial acetic acid CH3COOH, Hexadecanoic acid, methyl ester (CAS) Methylpalmitate Uniphat A60, n-Hexadecanoic acid Hexadecanoic acid n-Hexadecoic acid Palmitic acid, Dianhydromannitol and Ergosta-5,7,22-trien-3-ol, (3.beta., 22E) - (CAS) Ergosterol (CAS), while the chili root contains Acetic acid Ethanoic acid Ethylic acid Glacials acetic acid CH3COOH, Hexadecanoic acid, methyl ester (CAS) Methyl palmitate Uniphat A60, n -Hexadecanoic acid Hexadecanoic acid Palmitic acid, 8, 11- octadecadienoic acid, methyl ester (CAS) METHYL 8, 11-OCTADECADIENOATE, (23S)-ethylcholest-5-en-3.beta.-ol.s It can be concluded that some of the chemical compounds in methanol extracts identified in chili roots have similarities with chemical compounds that exist in   B. bassiana entomopathogenic fungus which are potential as stimulers of chili plant growth

Sign in / Sign up

Export Citation Format

Share Document