scholarly journals Ekstrak Lemak Gracilaria verrucosa sebagai Antibakteri Shigella dysentriae dan Escherichia coli

2020 ◽  
Vol 15 (1) ◽  
pp. 13
Author(s):  
Riong Seulina Panjaitan ◽  
Yulia Verawati Simanjuntak ◽  
Sumantri Sumantri
Keyword(s):  
Mass Spectrometry ◽  
Escherichia Coli ◽  
Gas Chromatography ◽  
Antibacterial Activity ◽  
Oleic Acid ◽  
Palmitic Acid ◽  
Gracilaria Verrucosa ◽  
Gas Chromatography Mass Spectrometry ◽  
Lipid Phase ◽  
Disc Diffusion

Makroalga merupakan salah satu sumber daya hayati yang melimpah di perairan Indonesia. Genus Gracilaria merupakan salah satu makroalga merah yang diketahui memiliki kandungan metabolit sekunder yang bersifat sebagai antibakteri. Genus ini memiliki ciri thallus agak padat dan keras untuk melekat pada substrat.  Penelitian ini bertujuan untuk menguji aktivitas antibakteri lipid/lemak dari Gracilaria verrucosa. Ekstraksi lipid/lemak dilakukan dengan metode Folch yang dimodifikasi menggunakan teknik Soxhlet dengan perbandingan pelarut metanol : kloroform 1:2 (v/v). Identifikasi profil asam lemak menggunakan Gas Chromatography-Mass Spectrometry (GC-MS). Uji aktivitas antibakteri berdasarkan metode disc-diffusion dan penentuan konsentrasi hambat minimum (KHM) menggunakan 5 konsentrasi berbeda yaitu, 20%, 40%, 60%, 80% dan 100% (v/v). Bakteri uji yang digunakan adalah Shigella dysentriae dan Escherichia coli. Hasil penelitian menunjukkan kandungan lipid keseluruhan yang diperoleh sebesar 3,45% (v/v) dengan komposisi fasa kloroform sebesar 1,15% (v/v) dan fasa metanol sebesar 2,30% (v/v). Hasil identifikasi GC-MS menunjukkan bahwa lipid fasa metanol mengandung asam palmitat dan asam oleat. Sedangkan lipid fasa kloroform mengandung asam miristat, asam palmitoleat, asam stearat, asam arakidonat, asam palmitat dan asam oleat. Kedua fasa lipid menunjukkan aktivitas antibakteri terhadap Shigella dysentriae dan Escherichia coli. AbstractMacroalga (seaweed) is one of the abundant marine biological resources from Indonesian Waters. Gracilaria is a type of red macroalgae that has secondary metabolites as an antibacterial agent. Gracilaria has thallus that rather dense and hard to attach to the substrate. The objective of this research was to investigate the antibacterial activity of lipids from Gracilaria verrucosa. Lipids were extracted according to Folch method using Soxhlet technique in which the ratio of methanol : chloroform was 1:2 (v/v). Fatty acid profile was identified using Gas Chromatography-Mass Spectrometry (GC-MS). The antibacterial activity was evaluated by disc-diffusion method using five different concentrations to determinate the minimum inhibitory concentration (20%, 40%, 60%, 80%, and 100% (v/v)). Shigella dysentriae and Escherichia coli were used as test bacteria. The results showed that total lipid amount was 3.45% with 1.15% (v/v) consisted in chloroform phase and 2.30% (v/v) consisted in methanol phase. GC-MS identification results showed that methanol lipid phase contained palmitic acid and oleic acid, while the chloroform lipid phase had myristic acid, palmitoleic acid, stearic acid, arachidonic acid, palmitic acid and oleic acid. Both of lipid phases showed activities against Shigella dysentriae and Escherichia coli.

scholarly journals Comparative Profiling of Volatile Compounds in Popular South Indian Traditional and Modern Rice Varieties by Gas Chromatography–Mass Spectrometry Analysis

2020 ◽  
Vol 7 ◽  
Author(s):  
Kaliyaperumal Ashokkumar ◽  
Mahalingam Govindaraj ◽  
Sampathrajan Vellaikumar ◽  
V. G. Shobhana ◽  
Adhimoolam Karthikeyan ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Fatty Acids ◽  
Gas Chromatography ◽  
Oleic Acid ◽  
Linoleic Acid ◽  
Palmitic Acid ◽  
Volatile Compounds ◽  
Gas Chromatography Mass Spectrometry ◽  
Rice Varieties ◽  
Modern Varieties

Rice (Oryza sativa L.) is one of the major cereal crops cultivated across the world, particularly in Southeast Asia with 95% of global production. The present study was aimed to evaluate the total phenolic content (TPC) and to profile all the volatile organic compounds (VOCs) of eight popular traditional and two modern rice varieties cultivated in South India. Thirty-one VOCs were estimated by gas chromatography–mass spectrometry (GC-MS). The identified volatile compounds in the 10 rice varieties belong to the chemical classes of fatty acids, terpenes, alkanes, alkenes, alcohols, phenols, esters, amides, and others. Interestingly, most of the identified predominant components were not identical, which indicate the latent variation among the rice varieties. Significant variations exist for fatty acids (46.9–76.2%), total terpenes (12.6–30.7%), total phenols (0.9–10.0%), total aliphatic alcohols (0.8–5.9%), total alkanes (0.5–5.1%), and total alkenes (1.0–4.9%) among the rice varieties. Of all the fatty acid compounds, palmitic acid, elaidic acid, linoleic acid, and oleic acid predominantly varied in the range of 11.1–33.7, 6.1–31.1, 6.0–28.0, and 0.7–15.1%, respectively. The modern varieties recorded the highest palmitic acid contents (28.7–33.7%) than the traditional varieties (11.1–20.6%). However, all the traditional varieties had higher linoleic acid (10.0–28.0%) than the modern varieties (6.0–8.5%). Traditional varieties had key phenolic compounds, stearic acid, butyric acid, and glycidyl oleate, which are absent in the modern varieties. The traditional varieties Seeraga samba and Kichilli samba had the highest azulene and oleic acid, respectively. All these indicate the higher variability for nutrients and aroma in traditional varieties. These varieties can be used as potential parents to improve the largely cultivated high-yielding varieties for the evolving nutritional market. The hierarchical cluster analysis showed three different clusters implying the distinctness of the traditional and modern varieties. This study provided a comprehensive volatile profile of traditional and modern rice as a staple food for energy as well as for aroma with nutrition.

scholarly journals GC-MS analysis and antibacterial activity of the Sea cucumber (Muelleria lecanora) extract

2021 ◽  
Author(s):  
Muhammad Yusuf ◽  
Nur Fitriani Usdyana Attahmid
Keyword(s):  
Mass Spectrometry ◽  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Gas Chromatography ◽  
Antibacterial Activity ◽  
Sea Cucumber ◽  
Gas Chromatography Mass Spectrometry ◽  
Ultrasound Assisted Extraction ◽  
Assisted Extraction ◽  
Ultrasound Assisted

Sea cucumbers are marine invertebrates commonly found in benthic areas and deep seas. On a global scale, they have a high commercial value with an increased level of production and trade. This study aims to analyze the bioactive compound in Sea cucumber (Muelleria lecanora) using the Ultrasound-Assisted Extraction Method (UAE) and Gas Chromatography-Mass Spectrometry (GC-MS). Furthermore, it identifies the antibacterial activity in microorganisms Salmonella, Escherichia coli, and Staphylococcus aureus. The bioactive compounds were extracted using methanol, acetone, and n-hexane solvent and were separated by ultrasound-assisted extraction. In the initial stage, phytochemicals were screened using Gas Chromatography-Mass Spectrometry (GC-MS). Disc diffusion method was then used to determine the antibacterial activity against Salmonella, Staphylococcus aureus, and Escherichia coli. The results showed that methanol extract is more suitable for extracting bioactive compounds of Muelleria lecanora than acetone and n-hexane. Meanwhile, acetone solvents are more suitable for the production of flavonoid and steroid compounds than Mulleria lecanora samples. Heneicosane compounds that function as a new antiproliferative for inhibition of tumor and cancerous cells are produced from n-hexane. The antibacterial activity of acetone, methanol and n-hexane extract determined by diffusion assay was effective against Staphylococcus aureus and Salmonella but ineffective against Escherichia coli. GC-MS results showed that the major constituents obtained were steroid and flavanoid. From this study, Sea cucumber extract can be considered a healthy nutrient in food and pharmaceutical products.

scholarly journals Uji Aktivitas Antibakteri dari Ekstrak dan Fraksi Daging Buah Mangga Kasturi (Mangifera Casturi) terhadap Bakteri Pseudomonas Aeruginosa dan Bacillus Cereus

2021 ◽  
Vol 49 (2) ◽  
pp. 113-122
Author(s):  
Meliana Meliana ◽  
Sogandi Sogandi ◽  
Ekajayanti Kining
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Pseudomonas Aeruginosa ◽  
Antibacterial Activity ◽  
Ethyl Acetate ◽  
Bacillus Cereus ◽  
Inhibitory Concentration ◽  
Mangifera Indica ◽  
Ethyl Acetate Fraction ◽  
Gas Chromatography Mass Spectrometry

Kasturi (Mangifera casturi) is a typical plant of South Kalimantan which has only been used for consumption because of its distinctive taste and aroma. Mangifera indica, which is in the same genus as Mangifera casturi, shows antioxidant, antibacterial, antifungal, and antidiarrheal activity, so it is suspected that this plant has the same activity. Crude methanol extract from the meat of Casturi mango was fractionated using n-hexane, ethyl acetate, and methanol-water. Testing for antibacterial activity and minimum inhibitory concentration (MIC) were carried out using the disk diffusion method (Kirby-Bauer). The positive control used was Chloramphenicol because it has an antibacterial range that is rather broad and the negative control used was 10% DMSO. The fraction that had the greatest antibacterial activity was the ethyl acetate fraction; with the formation of a clear zone of 7.98mm against Pseudomonas aeruginosa and 7.52mm against Bacillus cereus, with a minimum inhibitory concentration of 2mg/mL. The next test was a cell leakage analysis which revealed an increase in absorbance at MIC 1 and MIC 2. The Gas Chromatography – Mass Spectrometry (GC-MS) results from the ethyl acetate fraction revealed the presence of phenolic, flavonoid, and glycoide content, with the highest compound concentration of 5-Hydroxymethylfurfural. Keywords: Antibacterial, Extract, Ethyl acetate, fraction, Mangifera casturi Abstrak Kasturi (Mangifera casturi) merupakan tumbuhan khas Kalimantan Selatan yang selama ini hanya dimanfaatkan untuk dikonsumsi karena rasa dan aromanya yang khas. Mangifera indica yang masih satu genus dengan Mangifera casturi menunjukkan aktivitas antioksidan, antibakteri, antijamur, dan antidiare sehingga diduga tanaman ini memiliki aktivitas yang sama. Ekstrak kasar metanol daging buah mangga kasturi difraksinasi dengan menggunakan n-heksan, etil asetat, dan metanol-air. Pengujian aktivitas antibakteri dan kadar hambat minimum dilakukan dengan menggunakan metode difusi cakram (Kirby- Bauer). Kontrol positif yang digunakan adalah Chloramfenikol karena memiliki spektrum antibakteri yang cukup luas dan kontrol negatif yang digunakan adalah DMSO 10%. Fraksi yang memiliki aktivitas antibakteri terbesar pada penelitian ini adalah fraksi etil asetat dengan terbentuknya zona bening sebesar 7,98mm terhadap Pseudomonas aeruginosa dan 7,52mm terhadap Bacillus cereus dengan kadar hambat minimum 2mg/mL. Uji selanjutnya adalah uji kebocoran sel yang menyatakan adanya peningkatan absorbansi pada KHM 1 dan KHM 2. Hasil pemeriksaan Gas Chromatography – Mass Spectrometry (GCMS) dari fraksi etil asetat menyatakan adanya kandungan fenolik, flavonoid, dan glikosida dengan senyawa tertinggi yaitu 5-Hydroxymethylfurfural. Kata kunci: Antibakteri, Ekstrak, Etil asetat, Fraksi, Mangifera castur

scholarly journals Chemical Composition and Antibacterial Activity of Pituranthos Chloranthus Volatile Oil

2007 ◽  
Vol 2 (11) ◽  
pp. 1934578X0700201 ◽  
Author(s):  
Mostepha Dahia ◽  
Hocine Laouer ◽  
Adel N. Chaker ◽  
Soizic Prado ◽  
Uwe J. Meierhenrich ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Pseudomonas Aeruginosa ◽  
Antibacterial Activity ◽  
Chemical Composition ◽  
Essential Oil ◽  
Volatile Oil ◽  
Gas Chromatography Mass Spectrometry ◽  
Chromatography Mass Spectrometry

The chemical composition of the essential oil of Pituranthos chloranthus ssp. cossonianus Maire (Apiaceae) was investigated by gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS) to reveal 54 compounds. The main constituents were myristicine (27.4%), limonene (15.8%), α-pinene (11.4%), and α-phellandrene (8.3%). The antibacterial activity of the oil was evaluated against several strains and was shown to be significant against Pseudomonas aeruginosa.

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