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Wednesday, September 1, 2021 | History

2 edition of Studies on the lipid and fatty acid composition of Micrococcus radiodurans found in the catalog.

Studies on the lipid and fatty acid composition of Micrococcus radiodurans

Norman Francis Lewis

Studies on the lipid and fatty acid composition of Micrococcus radiodurans

  • 84 Want to read
  • 26 Currently reading

Published .
Written in English

    Subjects:
  • Micrococcus radiodurans.,
  • Fatty acids.,
  • Lipids.,
  • Bacteria -- Physiology.

  • Edition Notes

    Statementby Norman Francis Lewis.
    The Physical Object
    Pagination53 leaves, bound :
    Number of Pages53
    ID Numbers
    Open LibraryOL14338178M

    In short, elevated LDL blood lipid profiles indicate an increased risk of heart attack, while elevated HDL blood lipid profiles indicate a reduced University of Maryland Medical Center reports that omega-3 fatty acids promote lower total cholesterol and lower triglycerides in people with high cholesterol.


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Studies on the lipid and fatty acid composition of Micrococcus radiodurans by Norman Francis Lewis Download PDF EPUB FB2

AN ABSTRACT OF THE THESIS OF NORMAN FRANCIS LEWIS (Name) for the M. in MICROBIOLOGY (Degree) (Major) Date thesis is presented Title STUDIES ON THE LIPID AND FATTY ACID COMPOSITION OF MICROCOCCUS RADI ODU RAN S Abstract approved (Major Professor) Comparatively little work has been done on bacterial lipids.

There are profound differences between bacterial lipids. Studies on the lipid and fatty acid composition of Micrococcus radiodurans Public Deposited. Comparatively little work has been done on bacterial lipids.

There are profound differences between bacterial lipids in general and lipids of the higher forms of life in such respects as the absence of sterols, phospholipids low in nitrogen but high Author: Norman Francis Lewis.

The lipid profiles and fatty acid composition of roes from two common fresh water fish viz.rohu (Labeo rohita) and murrel (Channa striatus) have been dehydrated fish egg was ground to fine powder and extracted with chloroformmethanol (, vv) to recover the total lipid in and on dry weight by: Abstract.

Sublethal â °rradiation of the bacterium Micrococcus radiodurans in aqueous suspension results in a loss of up to 6 percent of its cellular dry weight and 30 percent Estimated Reading Time: 6 mins.

Lipid contents and compositions were measured in 35 pigs from seven genotype-sex groups with large variations in body composition. The animals were slaughtered at kg live weight, and the left side was separated into four primal cuts: belly, ham, loin, and shoulder.

Samples of adipose tissues were taken from flare fat and from subcutaneous and intermuscular adipose tissues in each of Cited by:   In this chapter, we examine the structural diversity of lipids in the cell and the factors that affect lipid composition during laboratory culturing with particular emphasis on Bacillus organisms.

Methods used to extract, separate, and detect fatty acids are reviewed. An unidentified bacterial strain, SCRC, isolated from the intestine of a marine fish, Glossanodon semifasciatus, produced docosahexaenoic acid at 23 (molmol) [28 (ww)] of total fatty acids in a medium containing (wtvol) peptone and (wtvol) yeast extract at 12°C under atmospheric pressure.

The cell yield was gL. The major lipids of the strain were. Interactions of surfactants and fatty acids with lipids Rumiana Koynova, Boris Tenchov Institute of Biophysics, Bulgarian Academy of Sciences, Soa, Bulgaria Abstract The recent studies on the interaction of surfactants and fatty acids with lipids are inspired by the want of knowledge from.

The main fatty acids were hexadecanoic acid (C), palmitoleic acid (C), and eicosapentaenoic acid. In addition, docosahexaenoic acid only accumulated in the PLs fraction. These findings provide new information on the lipid types, fatty acid composition of each lipid class, and the fucoxanthin content in P.

tricornutum. The acid value is defined as the mg of KOH necessary to neutralize the fatty acids present in 1g of lipid. The acid value may be overestimated if other acid components are present in the system, e.

amino acids or acid phosphates. x Fatty Acyls (including fatty acids) are the major lipid building block of complex lipids and therefore is one of the most fundamental categories of biological lipids. The carbon chain may be saturated or unsaturated, and may be attached to functional groups containing oxygen, halogens, nitrogen and sulfur.

The lipid composition of D. radiodurans strain R 1 and of two mutant strains has been studied in relation to membrane fluidity and sensitivity to X-ray radiation. No significant difference in the unsaturation degree of fatty acids was found between parental and mutant strains. An important decrease of carbohydrate-containing lipids was observed in the radiosensitive mutant by: 8.

Phospholipid and lipopolysaccharide in Proteus mirabilis and its stable protoplast L-form. Difference in content and fatty acid composition.

Eur J Biochem. Aug 16; 67 (2) [Google Scholar] Gräfe U, Reinhardt G, Krebs D, Roth M, Noack D. Altered lipid composition in a non-differentiating derivative of Streptomyces hygroscopicus. Thetwo species showed similar fatty acid profiles.

Twenty fatty acids were identified, ranging from C 14 to C22; the major lipid classes were composed predominantly of C20 () and C 18 () fatty acids. The three mosr abundant fatty acids found in both species were C, CI and C I, making up more than 60 of the toral.

Globodera. We studied lipid and lipoprotein profiles, fatty acid (FA) composition, and oxidant-antioxidant status in 37 pediatric ADHD patients and 35 healthy control subjects.

Our results show that plasma triacylglycerols and phospholipids were lower, whereas free cholesterol, HDL, and apolipoprotein A-I were higher in ADHD patients compared with controls. The synthesis of fatty acids and lipids in Nannochloropsis sp. was investigated by labeling cells in vivo with [14 C]bicarbonate or [14 C]acetate.

[14 C]bicarbonate was incorporated to the greatest extent into, and fatty acids, which are the predominant fatty acids of r, more than half of the [14 C]acetate was incorporated into longer and more.

The major fatty acid in all strains was methyltetradecanoic acid (anteiso C 15) which occurred together with other anteiso acids, iso and straight-chain acids. The fatty acid profiles of the cellulomonads were distinguished by the presence of carbon acids and significantly higher proportions of straight-chain acids than found in the other.

The fatty acid composition of the C. alismatifolia leaves with different gamma irradiation treatment levels has been presented in Table 4.

The proportion of leaves fatty acids having 18 carbons was quite consistent across the four treatment levels, ranged from to.

Mean concentrations of C, Cn-9, Cn-6, and Cn Milton S da Costa. 16S ribosomal DNA (rDNA) sequences were determined for the five species of the genus Deinococcus (Deinococcus erythromyxa, Deinococcus proteolyticus, Deinococcus radiodurans. The total lipid of both larvae had palmitic, oleic, and linoleic as the major fatty acids.

The fatty acid composition of the GV-infected larval phospholipid differed considerably compared to that of the uninfected larvae, in that the ratio of unsaturated fatty acid to saturated fatty acid was times less in the GV-infected larvae.

Total Cellular Fatty Acids Radiolabelling Studies of Nitrogen Sufficient and Deficient Cells Conclusions LIPID ANALYSIS OF POTENTIALLY PROMISING STRAINS OF MICROALGAE.

Objectives Changes in Lipid Composition as a Result of N or. Si Limitation Composition of Samples Submitted by W. Thomas Lipoproteins for Lipid Transport Lipids enter metabolism from three different sources: (1) the diet, (2) storage in adipose tissue, and (3) synthesis in the liver. Whatever their source these lipids must eventually be transported in blood, an aqueous media.

To become water soluble, fatty acid release. composition applicable to a complex technology for grease waste utilization. In particular, microorganisms isolated from an environment contaminated with fats and bacte-ria applicable for removal of hydrocarbons were tested for their ability to degrade animal fats, vegetable oils, triglyc-erides and fatty acids and for lipase activity.

Furthermore. Researchers discover novel protocol to detect lipid production in microalgae. Dietary supplementation of fatty acids produced from microalgae have wide-reaching health benefits for humans Estimated Reading Time: 3 mins.

The maximum lipid content recorded was (ww) of the cell mass at a growth rate of h 1. The growth rate also affected fatty acid composition; polyunsaturated fatty acids (C and C) increaded with growth rate while other fatty acids (C, C, C) decreased.

Micrococcus. A genus of gram-positive, spherical bacteria found in soils and fresh water, and frequently on the skin of man and other animals.

Micrococcus luteus. A species of gram-positive, spherical bacteria whose organisms occur in tetrads and in irregular clusters of tetrads. The primary habitat is. Saturated fat has been demonised as a dietary culprit in heart disease due to its ability to raise low-density lipoprotein cholesterol (LDL-C), whereas omega-6 polyunsaturated fatty acid (PUFA) has been regarded as heart healthy due to its ability to lower total and LDL-C.

And replacing saturated fat with omega-6 has consistently been found to lower total cholesterol and LDL-C levels. 1 2 This. I have reviewed recent (March December ) papers on human milk lipids including many on fatty acid (FA) composition. The effects of maternal diets on the profiles are apparent.

However, more data on the composition of milk lipids are needed. It is noteworthy that so few papers on milk FA com. The emergence of antibiotic-resistant bacteria led to an urgent need for next-generation antimicrobial agents with novel mechanisms of action.

The use of positively charged antimicrobial peptides that target cytoplasmic membrane is an especially promising strategy since essential functions and the conserved structure of the membrane hinder the development of bacterial resistance.

enhance the lipid content of algae; moreover, growth under different light intensities exhibits remarkable changes in theirgross chemical composition[6].

Chen and Johns [7]demonstrated that fatty acid composition and lipid content of heterotrophically grown microalgae can be favorably manipulated by varying culture conditions. lipids with multiple branched hydrocarbons predominating. The polar lipid composition of glycolipids and phospholipids of all species investigated was fairly typical of photosynthetic eukaryotic algae in general.

The fatty acid compositions were species specific with changes occurring in the relative intensities of individual acid chains of. Fatty acids (FAs) are essential components of lipids and exhibit important biological functions.

The analyses of FAs are routinely carried out by gas chromatography -mass spectrometry after multistep sample preparation.

In this study, several key experimental factors were carefully examined, validated. Effect of Dietary Fatty Acids on Serum Lipids and Lipoproteins A Meta-analysis of 27 Trials Ronald P. Mensink and Martijn B. Katan To calculate the effect of changes in carbohydrate and fatty acid intake on serum lipid and lipoprotein levels, we reviewed 27 controlled trials published between and that met specific inclusion criteria.

Describe the current recommended intake levels for lipids. Recognize sources of saturated, trans, unsaturated, and essential fatty acids. Recommended Fat Intake.

Table (PageIndex{1}) includes the Acceptable Macronutrient Distribution Range (AMDR) recommendations for adults for the various types of lipidsfats.

Phospholipids and Biological Membranes. Triglycerides are classified as simple lipids because they are formed from just two types of compounds: glycerol and fatty contrast, complex lipids contain at least one additional component, for example, a phosphate group (phospholipid s) or a carbohydrate moiety (glycolipid s).

Figure depicts a typical phospholipid composed of two fatty. Deficiencies in CPT's lead to considerable muscle weakness, as fatty acids are a major fuel for muscles. Fatty Acid Activation and Transport. b-Oxidation of Free Fatty Acids With an Even Number of Carbons: Reactions 2 through 5 recycle to remove consecutive 2-carbon units.

On the final cycle, 2 acetyl CoA molecules are formed. Thus, a 16 carbon. Cell Chemical Biology Article Exogenous Fatty Acids Are the Preferred Source of Membrane Lipids in Proliferating Fibroblasts Cong-Hui Yao,1,2 Ronald Fowle-Grider,1,2 Nathanial G.

Mahieu,1,2 Gao-Yuan Liu,1,4 Ying-Jr Chen,1,2 Rencheng Wang,1,2,3 Manmilan Singh, 1Gregory S. Potter, Richard W. Gross,4 Jacob Schaefer, 1Stephen L.

Johnson,3 and Gary J. Patti,2. This study has provided new information on the changes in lipid metabolism which accompany parr-smolt transformation and suggests that diets which have a fatty acid composition more similar to that in aquatic invertebrates may be beneficial in effecting successful seawater adaptation.

Information on the fatty acid chain length combinations in lymph triglycerides containing medium-chain fatty acids was obtained combining the fatty acid composition and the carbon number composition of triglycerides from ascitic fluid of patients on medium-chain triglyceride-containing diets.

generation of reducing power (NADPH) for fatty acid synthesis. 36 Lipid accumulated in this yeast is considered as ideal for transesteri cation to produce biodiesel.

In general, its major fatty acid composition is as follows: 7 of palmitic acid (), of stearic acid (), of oleic. Omega-3 fatty acid, or alpha-linoleic acid (ALA), falls into this category and is one of only two fatty acids known to be essential for humans (the other being omega-6 fatty acid, or linoleic acid).

These polyunsaturated fatty acids are called omega-3 because the third carbon from the end of the hydrocarbon chain is connected to its neighboring.They are long hydrocarbon chain organic acids with a terminal carboxyl group (COOH).

The length of the hydrogen (H) chain differs from one fatty acid to another. Fatty acids are saturated and unsaturated carboxylic acids containing between carbon atoms. Fatty acids with even numbers of carbon atoms occur most frequently in nature.Background.

Differences in fatty acid content of plasma lipid fractions and serum lipid concentrations were investigated among young children fed different milk diets composed to achieve a recommended saturated fat intake.

Methods. Thirty-eight healthy children were randomly assigned to one of four feeding groups at 12 months: 1) low-fat milk ( g/dL cow's milk fat); 2) standard-fat milk.