Isolation and identification of hydroxyl–platelet-activating factor from natural sources

Life Sciences ◽  
2006 ◽  
Vol 79 (19) ◽  
pp. 1796-1803 ◽  
Author(s):  
Alexandros B. Tsoupras ◽  
Smaragdi Antonopoulou ◽  
George Baltas ◽  
Martina Samiotaki ◽  
George Panayotou ◽  
...  
Author(s):  
Muthusamy Palaniswamy ◽  
Vishnu Ts

ABSTRACTObjectives: The study was aimed at isolating and identifying violacein-producing bacteria from the different ecosystems.Methods: The violet color pigment (violacein) producing bacteria was isolated and identified morphologically and genomically.Results: A total of ten bacterial Chromobacterium sp. were isolated from different sources such as soil and water. The violacein productivity wasscreened by the total isolates and the selected two strains were identified as Chromobacterium violaceum CV4 and Chromobacterium vaccinii CV5 bymorphologically and genomically.Conclusion: In the present study, the two isolate was morphologically and genomically identified as Chromobacterium violaceum CV4 andChromobacterium vaccinii CV5, last one was found to be the novel strain from natural sources which possess a high violacein producing capability.Keywords: Chromobacterium sp., Violacein, Pigment production.


2019 ◽  
Vol 24 ◽  
pp. 154-159
Author(s):  
M. M. Radchenko ◽  
N. E. Beyko ◽  
G. S. Andriiash ◽  
О. О. Тigunova ◽  
С. М. Shulga

Aim. Aim of investigation was to receive riboflavin strain-producers using natural sources for development of riboflavin technology. Methods. Strain-producers were isolated by the method of imprints (replica). The identification of stains was done by commonly used techniques using the «Bergey's Manual of Systematic Bacteriology». The resulting clones were tested for accumulation of riboflavin by fluorometric method. Results. 9 natural sources (seeds of corn and potato tubers) were investigated, pure cultures of microorganisms werr isolated and their identification was carried out. Two types of bacterial colonies of the genus Bacillus were identified. Selected strains weretested for antibiotic susceptibility and for the ability to accumulate riboflavin. Conclusions. As a result of the research, strain-producing riboflavin is isolated, the strain is classified as B. subtilis. The strain accumulated 4.3 g / l of riboflavin in a sucrose medium during a 72 hours cultivation. This strain was accepted as a source for the development of riboflavin technology. Keywords: riboflavin, stain, microbial synthesis, Bacillus subtilis.


1970 ◽  
Vol 41 (1-2) ◽  
pp. 155-166 ◽  
Author(s):  
Frank E. Swatek ◽  
D. T. Omieczynski

2015 ◽  
Vol 12 (4) ◽  
pp. 396 ◽  
Author(s):  
Gordon W. Gribble

Environmental context The general perception that nature does not produce compounds containing halogens – chlorine, bromine, iodine and fluorine – is now known to be erroneous. Modern isolation and identification techniques have led to the discovery of more than 5000 halogen-containing compounds from myriad marine and terrestrial plant and animal sources. Many of these compounds possess extraordinary biological activity, including anticancer, antiviral and antibacterial activity of potential human benefit. Abstract This short review presents the naturally occurring organohalogen compounds discovered and characterised in 2014. They include compounds from both marine and terrestrial organisms, such as algae, sponges, corals, tunicates, bryozoans, fungi, bacteria, cyanobacteria and plants. Several novel structural types have been characterised. From only ~24 in 1968, naturally occurring organohalogens currently number more than 5000, and they continue to be discovered in all regions of the world. This review presents the 114 discovered organohalogens from natural sources in the year 2014.


Sign in / Sign up

Export Citation Format

Share Document