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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
61

Thermal properties of lysophosphatidylethanolamines

Nuzback, Dennis Edward. January 1979 (has links)
Call number: LD2668 .T4 1979 N89 / Master of Science
62

Synthesis of structured phospholipids with conjugated linolenic acid, and evaluation of their physical properties

Quezada Arboleda, Nathalie 15 May 2009 (has links)
Structured phospholipids with conjugated linolenic acid were produced for potential applications in nutraceuticals and functional foods. Structured phospholipids were synthesized with conjugated linolenic acid (CLnA) from natural sources by catalytic enzymatic reaction. Pomegranate seed oil, as a natural source of CLnA, and an isomerized-concentrated mixture (ICM) of CLnA from flaxseed oil were used for the enzymatic reaction with phosphotidylcholine (PC) using Liposyme TL IM for fatty acid modification at 57 °C for 96 h. The enzymatic process was an effective way to produce structured phospholipids with CLnA. The maximum incorporation of CLnA from pomegranate seed oil and ICM from flaxseed oil into PC was 11.3% and 4.9% after 72 h, respectively. Structured lysophospholipids were also obtained as a result of the enzymatic reaction. The maximum incorporation of CLnA from pomegranate oil and ICM from flaxseed oil into lysophospholipids was 17.2% and 13.5% after 72h, respectively. Physical properties such as dropping point and viscosity at 40 and 50 °C of the structured phospholipids produced were measured when they were added to a chocolate mixture (unsweetened chocolate 94.6%, coconut oil 5% and 0.4 % phospholipids). Two controls were used for comparison: the chocolate mixture without phospholipids and the chocolate mixture with Lipoid S100 (phosphatidylcholine 94%). Structured phospholipids with CLnA showed lower dropping point and viscosities than the controls. Oil-in-water emulsions were prepared with whey protein (1%), soy bean oil (10%) and phospholipids (0.5%) in a high pressure homogenizer at 20MPa. The emulsion stability of the emulsions prepared, control (without phospholipids), Lipoid S 100 and structured phospholipids with CLnA were determined by visual observation of phase separation. The structured phospholipids emulsion showed higher emulsion stability than the controls. This emulsion was stable up to 108 h while the emulsion without phospholipid and Lipoid S100 were 48 h and 96 h stable, respectively. Oxidative stability of the emulsions prepared was determined by measuring the peroxide value and p-anisidine value after 1, 3 and 7 days at 50 °C. Oil was extracted from the emulsions using isooctane:isopropanol (3:2 v/v). The structured phospholipid emulsions showed lower oxidative stability than the controls.
63

Synthesis of structured phospholipids with conjugated linolenic acid, and evaluation of their physical properties

Quezada Arboleda, Nathalie 15 May 2009 (has links)
Structured phospholipids with conjugated linolenic acid were produced for potential applications in nutraceuticals and functional foods. Structured phospholipids were synthesized with conjugated linolenic acid (CLnA) from natural sources by catalytic enzymatic reaction. Pomegranate seed oil, as a natural source of CLnA, and an isomerized-concentrated mixture (ICM) of CLnA from flaxseed oil were used for the enzymatic reaction with phosphotidylcholine (PC) using Liposyme TL IM for fatty acid modification at 57 °C for 96 h. The enzymatic process was an effective way to produce structured phospholipids with CLnA. The maximum incorporation of CLnA from pomegranate seed oil and ICM from flaxseed oil into PC was 11.3% and 4.9% after 72 h, respectively. Structured lysophospholipids were also obtained as a result of the enzymatic reaction. The maximum incorporation of CLnA from pomegranate oil and ICM from flaxseed oil into lysophospholipids was 17.2% and 13.5% after 72h, respectively. Physical properties such as dropping point and viscosity at 40 and 50 °C of the structured phospholipids produced were measured when they were added to a chocolate mixture (unsweetened chocolate 94.6%, coconut oil 5% and 0.4 % phospholipids). Two controls were used for comparison: the chocolate mixture without phospholipids and the chocolate mixture with Lipoid S100 (phosphatidylcholine 94%). Structured phospholipids with CLnA showed lower dropping point and viscosities than the controls. Oil-in-water emulsions were prepared with whey protein (1%), soy bean oil (10%) and phospholipids (0.5%) in a high pressure homogenizer at 20MPa. The emulsion stability of the emulsions prepared, control (without phospholipids), Lipoid S 100 and structured phospholipids with CLnA were determined by visual observation of phase separation. The structured phospholipids emulsion showed higher emulsion stability than the controls. This emulsion was stable up to 108 h while the emulsion without phospholipid and Lipoid S100 were 48 h and 96 h stable, respectively. Oxidative stability of the emulsions prepared was determined by measuring the peroxide value and p-anisidine value after 1, 3 and 7 days at 50 °C. Oil was extracted from the emulsions using isooctane:isopropanol (3:2 v/v). The structured phospholipid emulsions showed lower oxidative stability than the controls.
64

Synthesis, purification and characterization of the second transmembrane domain of Crep-1, Tm-B and effects of polyunsaturated phospholipids (plipc) and cholesterol on the alignment temperature and fluidity of magnetically aligned DMPC/DHPC phospholipid bilayers

Adhikari, Prem R. January 2003 (has links)
Thesis (M.S.)--Miami University, Dept. of Chemistry and Biochemistry, 2003. / Title from first page of PDF document. Document formatted into pages; contains ix, 87 p. : ill. Includes bibliographical references (p. 85-87).
65

Synthesis and kinetic evaluation of substrate-based phospholipid analogues and studies towards the synthesis of 5-hydroxyaloin A

Li, Hui, 1975- 28 August 2008 (has links)
Not available / text
66

POROUS PHOSPHOLIPID NANOSHELL PROTECTED APTAMER SENSOR FOR URINE MERCURY DETECTION

Li, Zhen January 2010 (has links)
Mercury exposure has been related to neurological diseases and poisoning. Quantification of mercury in biological fluids, such as serum or urine is an important diagnostic method for mercury exposure. We have developed an aptamer-encapsulated porous phospholipid nanoshell (PPN) sensor for sensing mercury in urine using a modified 15-mer single strand DNA.1 The probe is protected from DNAse and other biofouling species by encapsulation within the porous liposomes composed of mixed phospholipids, allowing direct application of the aptamer in biological fluids containing DNAse and other biofouling materials. The encapsulated sensor was directly tested in urine samples at physiological pH. We were able to detect below 100 ppb (500 nM) Hg2+ in urine (urine mercury threshold set by Biologischer Arbeitstoff Toleranz Wert or BAT)1 with no sample preparation other than pH adjustment. These results suggest that porous phospholipid nanoshells (PPNs) can serve as a general-purpose protection scaffold for biological sensing.
67

Phospholipids of the glomerular basement membrane

Fung, Kevin Kai-Sang. January 1971 (has links)
No description available.
68

The hydrolysis of inositol phospholipid in mouse exocrine pancreas /

Tennes, Karin Anne. January 1984 (has links) (PDF)
Thesis (Ph. D.)--University of Adelaide, 1985. / Includes bibliographical references (leaves 358-406).
69

Interactive effects of fish oil and methylmercury on the fatty acid profile of adult rat forebrain phospholipids

Baker, Julie Taylor, Craig-Schmidt, Margaret C. January 2007 (has links) (PDF)
Thesis(M.S.)--Auburn University, 2007. / Abstract. Vita. Includes bibliographic references.
70

Synthesis and antioxidant properties of vitamin B₆ derivates; and [omega]-alkynylated fatty acids as substrates for preparation of modified phospholipids, novel probes for evaluating lipid-protein interactions

Serwa, Remigiusz. January 2008 (has links)
Thesis (Ph. D. in Chemistry)--Vanderbilt University, May 2008. / Title from title screen. Includes bibliographical references.

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