oil components
Recently Published Documents


TOTAL DOCUMENTS

750
(FIVE YEARS 164)

H-INDEX

51
(FIVE YEARS 8)

Author(s):  
Riyadh Ahmed Atto Al-Shuaeeb ◽  
A. A. Yassin ◽  
Mahmoud A. A. Ibrahim ◽  
H. R. Abd El-Mageed ◽  
M. A. Ghandour ◽  
...  

2022 ◽  
Vol 82 ◽  
Author(s):  
S. Ullah ◽  
N. Ali ◽  
F. U. Dawar ◽  
M. Nughman ◽  
M. Rauf ◽  
...  

Abstract In this study, oil degrading bacteria discovered from fish living near the oil ports at Karachi in Pakistan were characterized. The bacteria isolated from skin, gills, and gut in fish could consume crude oil as a source of carbon and energy. Total 36 isolates were tested using Nutrient Agar (NA) and MSA media with different crude oil concentrations (0.2%, 0.5%, 0.7%, 1%, 2%, and 5%) and 4 out of 36 isolates (two Gram positive and two Gram negative bacteria) were selected for further identification. 16S rRNA gene sequencing revealed that the isolates are related to Bacillus velezensis, Bacillus flexus, Pseudomonas brenneri and Pseudomonas azotoforman. Oil degrading potential of these bacteria was characterized by GC-MS analysis of degradation of oil components in crude oil as well as engine oil. We found that one (2, 6, 10, 14-Tetramethylpentadecane) out of 42 components in the crude oil was fully eliminated and the other oil components were reduced. In addition, 26 out of 42 oil components in the engine oil, were fully eliminated and the rest were amended. Taken together, these studies identify that B. velezensis, B. flexus, P. brenneri and P. azotoforman have high oil degrading potential, which may be useful for degradation of oil pollutants and other commercial applications.


2021 ◽  
Vol 4 (2) ◽  
Author(s):  
Naila Iram ◽  
Muhammad Asif Hanif ◽  
Haq Nawaz Bhatti ◽  
Muhammad Shahid

Persistentantimicrobial drugs treatmenthas resulted in antimicrobial resistance in fungi. There is always a gap for newer antifungal agent. As fungi are associated with multiple health risks in humans and many diseases in crops as well.Objective: To find alternate natural antimicrobial agent as compared to the synthetic one. Method:Essential oil of Trachyspermumammi was isolated, fractionated, and subjected to GC-MS analysis. Components from fractions were derivatized to check their antimicrobial potential against fungal resistant strains. Results:Analysis showed γ -terpinene (39%), α-phellandrene (1.3%), α-pinene (0.5%), Sabinene (0.15%), β-pinene (4.40%),  β-myrcene (1.14%), O-cymene (15.78%),  p-cymefne (38.78%), and other components were less than 1%. Fractional components were derivatised and their antifungal action was studied. Conclusion: Ajwain oil components found to be good against resistant fungal strains. While some derivatives showed more and some less antimicrobial action.


2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Kehinde Oluwakemi Fagbemi ◽  
Daniel Ayandiran Aina ◽  
Olufunmiso Olusola Olajuyigbe

The present study aims to compare two traditional extraction techniques. A volatile compound from Tamarindus indica seed was obtained with Soxhlet extraction (SE) and hydrodistillation using the Clevenger apparatus (HDC). The extraction yield and chemical composition of the essential oil samples were compared. Both oils extracted were analyzed with GC-MS, and forty-one chemical compounds were identified in essential oil components from SE while forty chemical compounds were found in the HDC-extracted oil sample. The major essential oil components present in both the SE and HDC method are cis-vaccenic acid, 2-methyltetracosane, beta-sitosterol, 9,12-octadecadienoic acid (Z, Z)-, and n-hexadecanoic acid in varying concentrations. Moreover, the essential oils obtained by both methods look similar quantitatively but differ qualitatively. The HDC method produced more oxygenated compounds that contribute to the fragrance of the oil. The major constituents observed in the essential oil extracted by SE methods include cis-vaccenic acid (17.6%), beta-sitosterol (12.71%), 9,12-octadecadienoic acid (Z, Z)- (11.82%), n-hexadecanoic acid (8.16%), 9,12-octadecadienoic acid, methyl ester (5.84%), oleic acid (4.54%), and 11-octadecenoic acid and methyl ester (3.94%). However, in the hydrodistillation technique, the oil was mostly composed of 9,12-octadecadienoic acid (Z, Z)- (23.72%), cis-vaccenic acid (17.16%), n-hexadecanoic acid (11.53%), beta-sitosterol (4.53%), and octadecanoic acid (3.8%). From the data obtained, HDC seems to be a better method for extraction of Tamarindus indica essential oil compared to the Soxhlet extraction apparatus.


2021 ◽  
pp. 112763
Author(s):  
Cristina Fuentes ◽  
Samuel Verdú ◽  
Ana Fuentes ◽  
María José Ruiz ◽  
José Manuel Barat

Author(s):  
Abdelfattah Badr ◽  
Hanaa H. El-Shazly ◽  
Mahmoud Sakr ◽  
Mai M. Farid ◽  
Marwa Hamouda ◽  
...  

Abstract Background Wild medicinal plants are suffering natural environmental stresses and habitat destruction. The genetic diversity evaluation of wild accessions and their in vitro raised genotypes using molecular markers, as well as the estimation of substances of pharmaceutical value in wild plants and their regenerated genotypes are convenient approaches to test the genetic fidelity of regenerated plants as a source of substances of pharmaceutical value. In this study, the genetic diversity of 12 accessions of the medicinal plant Achillea fragrantissima, representing five sites in the mountains of South Sinai, Egypt, were estimated by the inter simple sequence repeats (ISSR) fingerprinting and their volatile oil components were identified using gas chromatography-mass spectrometry (GC-MS) analysis. The same accessions were regenerated in vitro and the genetic diversity and volatile oil components of propagated genotypes were determined and compared to their wild parents. Results Clustering and principal component analyses indicated that the wild accessions and their regenerated genotypes were genetically differentiated, but the regenerated plants are relatively more diverse compared to their wild parents. However, genetic variation between wild accessions is inherited to their in vitro propagated genotypes indicating genotypic differentiation of the examined accessions. The number of volatile oil compounds in the wild A. fragrantissima accessions was 31 compounds while in the in vitro propagated plants only 24 compounds were detected. Four major compounds are common to both wild and regenerated plants; these are artemisia ketone, alpha-thujone, dodecane, and piperitone. Conclusions Genome profiling and essential oil components analysis showed variations in A. fragrantissima accessions from different populations. Genetic differences between wild and regenerated genotypes were analyzed and validated with the final conclusion that in vitro conditions elicited higher genetic variation that is associated with reduced amount and diversity in the essential oil components.


2021 ◽  
Author(s):  
Ayesha Algade Amadu ◽  
Kweku Amoako Atta deGraft-Johnson ◽  
Gabriel Komla Ameka

Cyanobacteria also known as blue-green algae are oxygenic photoautotrophs, which evolved ca. 3.5 billion years ago. Because cyanobacteria are rich sources of bioactive compounds, they have diverse industrial applications such as algaecides, antibacterial, antiviral and antifungal agents, hence, their wide use in the agricultural and health sectors. Cyanobacterial secondary metabolites are also important sources of enzymes, toxins, vitamins, and other pharmaceuticals. Polyhydroxy- alkanoates (PHA) which accumulate intracellularly in some cyanobacteria species can be used in the production of bioplastics that have properties comparable to polypropylene and polyethylene. Some cyanobacteria are also employed in bioremediation as they are capable of oxidizing oil components and other complex organic compounds. There are many more possible industrial applications of cyanobacteria such as biofuel, biofertilizer, food, nutraceuticals, and pharmaceuticals. Additionally, the metabolic pathways that lead to the production of important cyanobacterial bioactive compounds are outlined in the chapter along with commercial products currently available on the market.


Sign in / Sign up

Export Citation Format

Share Document