1
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Isolation of Bioactive Compounds from the Fermented Seeds of Pentaclethra macrophylla. Chem Nat Compd 2021. [DOI: 10.1007/s10600-021-03464-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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2
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Block JH, Catalfomo P, Constantine GH, Kirk PW. Triglyceride Fatty Acids of Selected Higher Marine Fungi. Mycologia 2018. [DOI: 10.1080/00275514.1973.12019459] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- J. H. Block
- School of Pharmacy, Oregon State University, Corvallis, Oregon 97331
| | - P. Catalfomo
- School of Pharmacy, Oregon State University, Corvallis, Oregon 97331
| | - G. H. Constantine
- School of Pharmacy, Oregon State University, Corvallis, Oregon 97331
| | - P. W. Kirk
- Departments of Biology and Oceanography, Old Dominion University, Norfolk, Virginia 23508
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3
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Kumar A, Gupta M, Mazumder A, Poluri KM, Rao VK. Use of Box Behnken Design for Development of High Throughput Quantitative Proton Nuclear Magnetic Resonance Experiments for Industrial Applications. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.6b04697] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ajeet Kumar
- Defence Research and Development Establishment, Gwalior 474002, India
| | - Manish Gupta
- Defence Research and Development Establishment, Gwalior 474002, India
| | - Avik Mazumder
- Defence Research and Development Establishment, Gwalior 474002, India
| | - Krishna Mohan Poluri
- Department
of Biotechnology, Indian Institute of Technology Roorkee, Roorkee 247667, India
| | - Vepa K. Rao
- Defence Research and Development Establishment, Gwalior 474002, India
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4
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Xu JL, Riccioli C, Sun DW. An Overview on Nondestructive Spectroscopic Techniques for Lipid and Lipid Oxidation Analysis in Fish and Fish Products. Compr Rev Food Sci Food Saf 2015. [DOI: 10.1111/1541-4337.12138] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jun-Li Xu
- Food Refrigeration and Computerized Food Technology (FRCFT), School of Biosystems Engineering, Univ. College Dublin, Natl. Univ. of Ireland; Agriculture and Food Science Centre; Belfield Dublin 4 Ireland
| | - Cecilia Riccioli
- Food Refrigeration and Computerized Food Technology (FRCFT), School of Biosystems Engineering, Univ. College Dublin, Natl. Univ. of Ireland; Agriculture and Food Science Centre; Belfield Dublin 4 Ireland
| | - Da-Wen Sun
- Food Refrigeration and Computerized Food Technology (FRCFT), School of Biosystems Engineering, Univ. College Dublin, Natl. Univ. of Ireland; Agriculture and Food Science Centre; Belfield Dublin 4 Ireland
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5
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Authentication of beef versus horse meat using 60 MHz 1H NMR spectroscopy. Food Chem 2014; 175:1-9. [PMID: 25577043 PMCID: PMC4308633 DOI: 10.1016/j.foodchem.2014.11.110] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Revised: 10/24/2014] [Accepted: 11/19/2014] [Indexed: 11/20/2022]
Abstract
This work reports a candidate screening protocol to distinguish beef from horse meat based upon comparison of triglyceride signatures obtained by 60 MHz (1)H NMR spectroscopy. Using a simple chloroform-based extraction, we obtained classic low-field triglyceride spectra from typically a 10 min acquisition time. Peak integration was sufficient to differentiate samples of fresh beef (76 extractions) and horse (62 extractions) using Naïve Bayes classification. Principal component analysis gave a two-dimensional "authentic" beef region (p=0.001) against which further spectra could be compared. This model was challenged using a subset of 23 freeze-thawed training samples. The outcomes indicated that storing samples by freezing does not adversely affect the analysis. Of a further collection of extractions from previously unseen samples, 90/91 beef spectra were classified as authentic, and 16/16 horse spectra as non-authentic. We conclude that 60 MHz (1)H NMR represents a feasible high-throughput approach for screening raw meat.
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6
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Martínez-Yusta A, Goicoechea E, Guillén MD. A Review of Thermo-Oxidative Degradation of Food Lipids Studied by1H NMR Spectroscopy: Influence of Degradative Conditions and Food Lipid Nature. Compr Rev Food Sci Food Saf 2014. [DOI: 10.1111/1541-4337.12090] [Citation(s) in RCA: 96] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Andrea Martínez-Yusta
- Dept. of Food Technology; Lascaray Research Center; Faculty of Pharmacy; Univ. of the Basque Country (UPV/EHU); Vitoria Spain
| | - Encarnación Goicoechea
- Dept. of Food Technology; Lascaray Research Center; Faculty of Pharmacy; Univ. of the Basque Country (UPV/EHU); Vitoria Spain
| | - María D. Guillén
- Dept. of Food Technology; Lascaray Research Center; Faculty of Pharmacy; Univ. of the Basque Country (UPV/EHU); Vitoria Spain
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7
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Quantitative determination of fatty acid chain composition in pork meat products by high resolution 1H NMR spectroscopy. Food Chem 2012; 136:546-54. [PMID: 23122096 DOI: 10.1016/j.foodchem.2012.08.058] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2011] [Revised: 05/02/2012] [Accepted: 08/22/2012] [Indexed: 01/06/2023]
Abstract
High resolution (1)H NMR spectroscopy was proposed for the determination of the fatty acid chain profile of lipids in pork meat products during ripening. Two typical Mediterranean PDO salami produced in Calabria, a region in the Southern Italy, were chosen as a case of study. Quantitative NMR analysis provided the fatty acid chain profiles of total lipid extracts. The transesterification of total lipid extracts furnished FAME mixtures that enabled quantitation of fatty acid acyl chains in the acylglycerol and FFA portions. In all cases, oleyl chains were predominant, and high amounts of polyunsaturated fatty acid chains were observed. The proposed spectroscopic method allowed also the estimation of the most important nutritional parameters of dry fermented meat products.
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8
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Berglund J, Ahlström H, Kullberg J. Model-based mapping of fat unsaturation and chain length by chemical shift imaging-phantom validation and in vivo feasibility. Magn Reson Med 2012; 68:1815-27. [DOI: 10.1002/mrm.24196] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2011] [Revised: 12/22/2011] [Accepted: 01/12/2012] [Indexed: 01/11/2023]
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9
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A multiway chemometric and kinetic study for evaluating the thermal stability of edible oils by 1H NMR analysis: Comparison of methods. Talanta 2012; 88:358-68. [DOI: 10.1016/j.talanta.2011.11.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2011] [Revised: 10/24/2011] [Accepted: 11/01/2011] [Indexed: 11/20/2022]
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10
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Sharma YC, Agrawal S, Singh B, Frómeta AEN. Synthesis of economically viable biodiesel from waste frying oils (WFO). CAN J CHEM ENG 2011. [DOI: 10.1002/cjce.20666] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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11
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Assessment of Different Measurement Methods Using 1H-NMR Data for the Analysis of the Transesterification of Vegetable Oils. J AM OIL CHEM SOC 2011. [DOI: 10.1007/s11746-011-1951-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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12
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Multivariate Analysis of 1H-NMR Spectra of Genetically Characterized Extra Virgin Olive Oils and Growth Soil Correlations. J AM OIL CHEM SOC 2011. [DOI: 10.1007/s11746-011-1812-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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13
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14
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Guillen MD, Goicoechea E. Oxidation of corn oil at room temperature: Primary and secondary oxidation products and determination of their concentration in the oil liquid matrix from 1H nuclear magnetic resonance data. Food Chem 2009. [DOI: 10.1016/j.foodchem.2009.02.029] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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15
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Guillén MD, Ruiz A. Monitoring of heat-induced degradation of edible oils by proton NMR. EUR J LIPID SCI TECH 2008. [DOI: 10.1002/ejlt.200600299] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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16
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BROSIO E, CONTI F, NOLA A, SYKORA S. Correlation between iodine number and proton relaxation times in maize oil. Int J Food Sci Technol 2007. [DOI: 10.1111/j.1365-2621.1981.tb00997.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Guillén MD, Ruiz A. Study by means of 1H nuclear magnetic resonance of the oxidation process undergone by edible oils of different natures submitted to microwave action. Food Chem 2006. [DOI: 10.1016/j.foodchem.2005.04.013] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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18
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Kumar Srivastava N, Pradhan S, Mittal B, Kumar R, Nagana Gowda GA. An Improved, Single Step Standardized Method of Lipid Extraction from Human Skeletal Muscle Tissue. ANAL LETT 2006. [DOI: 10.1080/00032710500477001] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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19
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Study by proton nuclear magnetic resonance of the thermal oxidation of oils rich in oleic acyl groups. J AM OIL CHEM SOC 2005. [DOI: 10.1007/s11746-005-1077-2] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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20
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Guillén MD, Ruiz A. Monitoring the oxidation of unsaturated oils and formation of oxygenated aldehydes by proton NMR. EUR J LIPID SCI TECH 2005. [DOI: 10.1002/ejlt.200401056] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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21
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Guillén MD, Ruiz A. Formation of hydroperoxy- and hydroxyalkenals during thermal oxidative degradation of sesame oil monitored by proton NMR. EUR J LIPID SCI TECH 2004. [DOI: 10.1002/ejlt.200401026] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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22
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23
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Guillén MD, Ruiz A. Rapid simultaneous determination by proton NMR of unsaturation and composition of acyl groups in vegetable oils. EUR J LIPID SCI TECH 2003. [DOI: 10.1002/ejlt.200300866] [Citation(s) in RCA: 155] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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24
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Guillén MD, Ruiz A, Cabo N, Chirinos R, Pascual G. Characterization of sacha inchi (Plukenetia volubilis
L.) oil by FTIR spectroscopy and 1
H NMR. Comparison with linseed oil. J AM OIL CHEM SOC 2003. [DOI: 10.1007/s11746-003-0768-z] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- María D. Guillén
- ; Tecnología de Alimentos, Facultad de Farmacia; Universidad del País Vasco; Paseo de la Universidad 7 01006 Vitoria Spain
| | - Ainhoa Ruiz
- ; Tecnología de Alimentos, Facultad de Farmacia; Universidad del País Vasco; Paseo de la Universidad 7 01006 Vitoria Spain
| | - Nerea Cabo
- ; Tecnología de Alimentos, Facultad de Farmacia; Universidad del País Vasco; Paseo de la Universidad 7 01006 Vitoria Spain
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25
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Guillén MD, Ruiz A. High resolution 1H nuclear magnetic resonance in the study of edible oils and fats. Trends Food Sci Technol 2001. [DOI: 10.1016/s0924-2244(01)00101-7] [Citation(s) in RCA: 138] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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26
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A rapid and simple method for the determination of iodine values using derivative Fourier transform infrared measurements. Anal Chim Acta 2001. [DOI: 10.1016/s0003-2670(00)01193-4] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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27
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Yoshioka Y, Sasaki J, Yamamoto M, Saitoh K, Nakaya S, Kubokawa M. Quantitation by (1)H-NMR of dolichol, cholesterol and choline-containing lipids in extracts of normal and phathological thyroid tissue. NMR IN BIOMEDICINE 2000; 13:377-383. [PMID: 11114060 DOI: 10.1002/1099-1492(200011)13:7<377::aid-nbm658>3.0.co;2-e] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Proton magnetic resonance spectroscopy at 1.9 T was used to quantify dolichols, cholesterols, choline-containing phospholipids and double bonds in unsaturated acyl chains in lipid extracts of four types of thyroid tissue [normal (n = 27), papillary cancer (n = 15), adenoma (n = 13) and Basedow disease (n = 6)]. In normal thyroid the mean concentrations of dolichol, cholesterol and phospholipids were 1.2, 3.6 and 2.1 micromol/g wet weight, respectively. The concentrations of these lipids exhibited positive mutual correlations and positive correlations with patient age. The increase in dolichol in elderly human thyroid may be due to the accumulation of lysosomes and may help to compensate for the decrease in the activity of lysosomal enzymes and in thyroid hormone production and release. Dolichol concentrations were significantly lower in papillary cancer (0.4 micromol/g) and Basedow disease (0.3 micromol/g) compared to normal thyroid (p < 0.01 and p < 0.05, respectively), while cholesterol was enhanced only in cancer tissue (10.7 micromol/g). Benign adenoma exhibited normal levels of both dolichol and cholesterol. These results suggest that the synthesis and accumulation of isoprenoids are normal in adenoma but not in cancer.
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Affiliation(s)
- Y Yoshioka
- Department of Physiology II, School of Medicine, Iwate Medical University, Morioka 020-8505, Japan.
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28
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Figueiredo JN, Räz B, Séquin U. Novel quinone methides from Salacia kraussii with in vitro antimalarial activity. JOURNAL OF NATURAL PRODUCTS 1998; 61:718-723. [PMID: 9644053 DOI: 10.1021/np9704157] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Three novel quinone methides, i.e., 28-nor-isoiguesterin-17-carbaldehyde (1), 17-(methoxycarbonyl)-28-nor-isoiguesterin (2), and 28-hydroxyisoiguesterin (3), together with the known celastrol (5), pristimerin (6), and isoiguesterol (7), were isolated from the roots of Salacia kraussii (Celastraceae) by bioassay-guided fractionation. The structures of the compounds were determined by DEPT and 2D NMR techniques. The isolates showed antimalarial activity 30-50-fold greater than their cytotoxicity (in HT-29 cells) in vitro, and they showed an additive effect when combined with each other. In vivo, 2 was found to be inactive against blood stages of Plasmodium berghei in mice after oral and parenteral administration, and the compound was toxic with increasing concentrations.
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Affiliation(s)
- J N Figueiredo
- Institut für Organische Chemie, Universität Basel, St. Johanns-Ring 19, CH-4056 Basel, Switzerland
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29
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Yang CM, Grey AA, Archer MC, Bruce WR. Rapid quantitation of thermal oxidation products in fats and oils by 1H-NMR spectroscopy. Nutr Cancer 1998; 30:64-8. [PMID: 9507515 DOI: 10.1080/01635589809514642] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
This work describes the application of high-resolution proton nuclear magnetic resonance (1H-NMR) spectroscopy to the study of the thermal peroxidation of beef tallow and corn oil under standardized conditions. The approach provides a rapid, quantitative method for determining the degree of oxidation of unsaturated fatty acids in animal and vegetable fats and oils by quantitating the decreasing intensities of 1H-NMR peaks for allylic and olefinic protons in unsaturated fatty acid chains of triglycerides and the increasing peak intensities of hydroperoxide and saturated and alpha, beta-unsaturated aldehydic protons in relation to the less labile protons in the triglyceride molecule. Two-dimensional correlation spectroscopy analysis of highly oxidized beef tallow (180 degrees C for 24 h) suggested that the unsaturated aldehydes that persisted were apparently associated with carboxy groups.
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Affiliation(s)
- C M Yang
- Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, ON, Canada
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30
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Jie MS, Mustafa J. High-resolution nuclear magnetic resonance spectroscopy--applications to fatty acids and triacylglycerols. Lipids 1997; 32:1019-34. [PMID: 9358427 DOI: 10.1007/s11745-997-0132-y] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
During the past two decades, nuclear magnetic resonance spectroscopy (NMR) has played an ever-increasing role in the structural determination of fatty acids, fatty acid derivatives and analogues, and in the analysis of the structures of triacylglycerols including the quantitative analysis of lipid mixtures. This article discusses some of the results obtained through the application of the NMR technique to lipid molecules and reviews the literature. To maintain brevity, this article does not cover the underlying theory of NMR spectroscopy as numerous books devoted to modern NMR spectroscopy have been published.
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Affiliation(s)
- M S Jie
- Department of Chemistry, University of Hong Kong.
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31
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Hayakawa Y, Yoshioka Y, Yasuda N. Effects of ligation and reperfusion of hepatic afferent vessels on the composition of liver cell membrane in the rat: 1H- and 31P-magnetic resonance spectroscopic analysis. NMR IN BIOMEDICINE 1997; 10:257-262. [PMID: 9449128 DOI: 10.1002/(sici)1099-1492(199709)10:6<257::aid-nbm471>3.0.co;2-b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Biochemical changes that occur within hepatic tissue of the rat during ischemia and subsequent reperfusion were investigated using magnetic resonance spectroscopy of liver extracts. Hepatic ischemia was produced in the rat by a continuous clamping of the left branches of the hepatic artery and portal vein. In the reperfusion experiments, the vascular clamps were released after 30 or 120 min of ischemic periods. At the end of the periods of ischemia and/or reperfusion, the left and middle hepatic lobes were dissected and processed for subsequent 1H-MRS and 31P-MRS analyses. Phosphatidylcholine, sphingomyelin, phosphatidic acid and phosphatidylethanolamine contents all showed reduction of about 30% after 120 min of ischemia. In contrast, the content of lysophosphatidylcholine showed relatively small changes following ischemia. Ten minutes after initiation of reperfusion, further decline of the total phospholipid content resulting in as much 42% reduction was observed. Then it recovered to nearly the control level when ischemia was for 30 min, but to only 65% of the control level when ischemia was for 120 min. The cholesterol/-N-(CH3)3 ratio, generally regarded as a parameter for membrane fluidity, showed about a 40% increase when ischemia was for 120 min, a change toward decreased membrane fluidity. These results appear to reflect ischemia/reperfusion-induced changes of membrane phospholipid metabolism.
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Affiliation(s)
- Y Hayakawa
- Second Department of Physiology, School of Medicine, Iwate Medical University, Japan
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32
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WOOD R, REISER R. CYCLOPROPANE FATTY ACID METABOLISM: PHYSICAL AND CHEMICAL IDENTIFICATION OF PROPANE RING METABOLIC PRODUCTS IN THE ADIPOSE TISSUE. J AM OIL CHEM SOC 1996; 42:315-20. [PMID: 14279117 DOI: 10.1007/bf02540137] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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33
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Sacchi R, Patumi M, Fontanazza G, Barone P, Fiordiponti P, Mannina L, Rossi E, Segre AL. A high-field1
H nuclear magnetic resonance study of the minor components in virgin olive oils. J AM OIL CHEM SOC 1996. [DOI: 10.1007/bf02517951] [Citation(s) in RCA: 117] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- R. Sacchi
- ; Dipartimento di Scienza degli Alimenti; Università di Napoli Federico II, Facoltà di Agraria; Portici Napoli 80055
| | - M. Patumi
- ; Istituto Ricerche sull'Olivicoltura; CNR; Perugia 06100 Italy
| | - G. Fontanazza
- ; Istituto Ricerche sull'Olivicoltura; CNR; Perugia 06100 Italy
| | - P. Barone
- ; Istituto Applicazioni Calcolo Mauro Picone; CNR; Roma 00161 Italy
| | - P. Fiordiponti
- ; NMR Servizio and Istituto Structturistica Chimica; CNR; Area della Ricerca, M.B.10 Roma 00016 Monterotondo Stazione Italy
| | - L. Mannina
- ; NMR Servizio and Istituto Structturistica Chimica; CNR; Area della Ricerca, M.B.10 Roma 00016 Monterotondo Stazione Italy
| | - E. Rossi
- ; NMR Servizio and Istituto Structturistica Chimica; CNR; Area della Ricerca, M.B.10 Roma 00016 Monterotondo Stazione Italy
| | - A. L. Segre
- ; NMR Servizio and Istituto Structturistica Chimica; CNR; Area della Ricerca, M.B.10 Roma 00016 Monterotondo Stazione Italy
- IBEV, CNR; Monterotondo Stazione Roma Italy
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34
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MATSUI T, IWASAKI H, MATSUMOTO K, OSAJIMA Y. Quality Evaluation of Edible Oils by Proton Nuclear Magnetic Resonance Measurement. ACTA ACUST UNITED AC 1995. [DOI: 10.3136/fsti9596t9798.1.94] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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35
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Gopala Krishna AG. Isolation and identification of the causative factors responsible for color fixation in rice bran oil. J AM OIL CHEM SOC 1993. [DOI: 10.1007/bf02542601] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- A. G. Gopala Krishna
- ; Discipline of Confectionery and Convenience Foods; Central Food Technological Research Institute; Mysore 570 013 India
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36
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Applications of low-resolution pulsed NMR to the determination of oil and moisture in oilseeds. Trends Food Sci Technol 1992. [DOI: 10.1016/0924-2244(92)90188-3] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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37
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Enhanced Quantitative Analytical Capability with a Nuclear Magnetic Resonance (NMR) Spectrometer by Use of an External Integrating Recorder. J Forensic Sci 1987. [DOI: 10.1520/jfs11142j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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38
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Eberhart ST, Hatzis A, Rothchild R. Quantitative NMR assay for aspirin, phenacetin, and caffeine mixtures with 1,3,5-trioxane as internal standard. J Pharm Biomed Anal 1986; 4:147-54. [PMID: 16867610 DOI: 10.1016/0731-7085(86)80036-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/1984] [Revised: 07/17/1984] [Indexed: 11/16/2022]
Abstract
The method for (1)H NMR determination of aspirin, phenacetin and caffeine (APC) mixtures has been improved by the use of 1,3,5-trioxane as an internal standard. The trioxane absorption occurs in a peak-free region of the spectrum and produces no interferences with any of the analytes. Compared to the original method with caffeine as an external standard, the present method appears to offer better accuracy and precision. Average errors relative to the correct results were: aspirin, 1.0%; phenacetin, 0.8%; and caffeine 1.8%, for known standard mixtures. Coupling constants, (1)J((13)CH), were determined for the methyl groups of aspirin and caffeine and for the trioxane methylene group to clarify potential (13)C satellite interferences.
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Affiliation(s)
- S T Eberhart
- The City University of New York, John Jay College of Criminal Justice, Department of Science, 445 West 59th Street, New York, NY 10019-1199, USA
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Gerth WA. Applicability of Henry's law to hydrogen, helium, and nitrogen solubilities in water and olive oil at 37 degrees C and pressures up to 300 atmospheres. Arch Biochem Biophys 1985; 241:187-99. [PMID: 4026315 DOI: 10.1016/0003-9861(85)90375-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The solubilities of pure hydrogen, helium, and nitrogen in water and olive oil were measured at 37 degrees C at gas-saturation pressures from 25 to 300 atmospheres. Rigorous thermodynamic criteria were used to assess the applicability of Henry's law to the pressure dependence of the gas solubility in each system. The solubilities of the three gases in water and helium in olive oil followed Henry's law as given by the Krichevsky-Kasarnovsky equation. In contrast, hydrogen and nitrogen in olive oil each attained concentrations high enough to cause significant concentration-dependent variations of the dissolved gas activity coefficient and/or partial molal volume. The consequent deviations from Henry's law were greatest in the nitrogen-oil system, where mole fraction nitrogen solubilities calculated from the Krichevsky-Kasarnovsky equation exceeded measured values by 8, 14, and 23% at 50, 100, and 250 atm, respectively. Incorporation of results into the critical volume model of nitrogen anesthesia, using olive oil as a model of the physiological anesthetic site and literature data for the anesthetic potency of nitrogen in mice breathing high-pressure He-N2-O2 atmospheres, shows that nonideal solution behavior may become important for gases dissolved in physiological hydrophobic regions at biologically active concentrations, even if dissolved gas binding to proteins or other macromolecules is not involved.
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Muñoz-Martínez EJ, Cueva J, Joseph-Nathan P. Denervation caused by tullidora (Karwinskia humboldtiana). Neuropathol Appl Neurobiol 1983; 9:121-34. [PMID: 6866208 DOI: 10.1111/j.1365-2990.1983.tb00330.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Crude homogenate of the seed of the tullidora (Coyotillo, buckthorn; Karwinskia humboldtiana) fruit or a purified neurotoxin extracted from it was administered orally to male Wistar rats. Three to 5 weeks later, gait disturbances and progressive flaccid paralysis of the hindlimbs appeared in these animals which were then submitted to acute experiments. Single twitch and tetanic contractions of the soleus muscle were studied in the tullidora treated rats. The twitch tension elicited by direct stimulation of the muscle was greater than that produced by nerve stimulation. In addition, the tension of nerve-elicited twitches diminished as the stimulating electrode was moved towards the spinal cord, suggesting failure of nerve conduction. When the muscle was directly stimulated, contraction and relaxation were slower than normal and the tetanus/twitch tension ratio was subnormal. These data suggest partial denervation of the soleus muscle under the action of the toxin. Electron microscopy revealed abnormal motor-nerve endings with few synaptic vesicles and denervated end-plates. Degenerative changes of axons and myelin disturbances were frequently seen in the intramuscular branches of the soleus nerve. However, alterations of this type were less severe in the nerve sections closer to the spinal cord and no significant changes were detected at the upper portion of the sciatic nerve. It is concluded that the paralysis produced by the tullidora toxin is the result of both conduction block of the nerve impulses and muscle denervation.
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The estimation by n.m.r. of iodine value and average molecular weight of marine oils containing wax esters. Anal Chim Acta 1975. [DOI: 10.1016/s0003-2670(00)00170-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Studies on the nuclear magnetic resonance spectra of olefinic protons of conjugated fatty acid methyl esters. Lipids 1970. [DOI: 10.1007/bf02531308] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Conway TF, Johnson LF. Nuclear magnetic resonance measurement of oil "unsaturation" in single viable corn kernels. Science 1969; 164:827-8. [PMID: 5767781 DOI: 10.1126/science.164.3881.827] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
High-resolution nuclear magnetic resonance spectroscopy has been used to demonstrate the feasibility of determining iodine value and average molecular weight of oil in individual corn kernels. The procedure is rapid and nondestructive. Depending on heritability of individual fatty acids, this technique may greatly increase selection efficiency in breeding programs to alter the fatty acid composition of corn oil.
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Battino R, Evans FD, Danforth WF. The solubilities of seven gases in olive oil with reference to theories of transport through the cell membrane. J AM OIL CHEM SOC 1968; 45:830-3. [PMID: 5724046 DOI: 10.1007/bf02540163] [Citation(s) in RCA: 120] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Solvent effects on the nuclear magnetic resonance spectra of methyl hydroxystearates. J AM OIL CHEM SOC 1966. [DOI: 10.1007/bf02682567] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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