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  • 1
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    Effect of freezing on the chemical quality changes and fatty acid composition of cultured shrimp muscle, Litopenaus vannamei (2017)
    Details
    Publication Date: 2021-05-19
    Description: Effect of freezing on the chemical quality and fatty acid composition of cultured shrimp muscle, Litopenaus vannamei were investigated by measuring moisture content, ash, total protein content, total lipid content, fatty acid composition, and Thio barbituric Acid (TBA) during 6 month keeping in frozen storage at 18°C. According to the results, moisture content (75.93% to 73.10%), ash (1.5% to 2.07%), total protein content (25.3% to 20.87%) and total lipid content (0.83% to 0.23%) changed during six month of frozen storage. PUFA (45.21%) content was higher than the SFA (30.08%) and MUFA (19.32%) content. The poly chain unsaturated fatty acids, saturated fatty acids and mono chain unsaturated fatty acids in shrimp muscle were C18:2n6 (15.32%), C20:5n3 (9.68%), C22:6n3 (8.48%), C16:0(15.18%), C18:0 (13.04%) and C18:1n9 (15.32%), respectively. The thio barbituric acid values (TBA) ranged from 0.0065 to 0.35 mg malonaldehyde/kg during freezing storage. The lipid stability of shrimp muscle, were in acceptable limit during frozen storage for up to 6 month.
    Description: Published
    Keywords: Shrimp ; Litopenaus vannamei ; Freezing ; Food quality ; Fisheries products ; Chemical composition ; Fatty Acid ; Composition ; Muscle
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.31-44
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  • 2
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    Effect of freezing on the chemical quality changes and fatty acid composition of cultured shrimp muscle, Litopenaus vannamei (2021)
    In:  http://aquaticcommons.org/id/eprint/21907 | 18721 | 2018-01-15 10:27:05 | 21907 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-04
    Description: Effect of freezing on the chemical quality and fatty acid composition of cultured shrimp muscle, Litopenaus vannamei were investigated by measuring moisture content, ash, total protein content, total lipid content, fatty acid composition, and Thio barbituric Acid (TBA) during 6 month keeping in frozen storage at 18°C. According to the results, moisture content (75.93% to 73.10%), ash (1.5% to 2.07%), total protein content (25.3% to 20.87%) and total lipid content (0.83% to 0.23%) changed during six month of frozen storage. PUFA (45.21%) content was higher than the SFA (30.08%) and MUFA (19.32%) content. The poly chain unsaturated fatty acids, saturated fatty acids and mono chain unsaturated fatty acids in shrimp muscle were C18:2n6 (15.32%), C20:5n3 (9.68%), C22:6n3 (8.48%), C16:0(15.18%), C18:0 (13.04%) and C18:1n9 (15.32%), respectively. The thio barbituric acid values (TBA) ranged from 0.0065 to 0.35 mg malonaldehyde/kg during freezing storage. The lipid stability of shrimp muscle, were in acceptable limit during frozen storage for up to 6 month.
    Keywords: Aquaculture ; Biology ; Food quality ; Fisheries products ; Chemical composition ; Iran ; Litopenaus vannamei
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 31-44
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  • 3
    Electronic Resource
    Electronic Resource
    High-density plasma-induced etch damage of InGaN/GaN multiple quantum well light-emitting diodes (2002)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 92 (2002), S. 1189-1194 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Plasma-induced damage of InGaN/GaN multiple quantum well (MQW) light-emitting diodes (LEDs) has been studied in terms of forward turn-on and reverse breakdown voltages, together with etch rate and surface morphology. The physical degradation of sidewall along with rough surface morphology of n–GaN caused by increased ion scattering induced the deterioration of the forward and reverse voltages. The forward turn-on voltage was relatively independent of the pressure up to 20 mTorr. The reverse breakdown voltage showed the worst degradation at 75% Cl2 mainly because of a sidewall contamination. It was found that the turn-on voltage is sensitive to the surface roughness of the etched n–GaN and the breakdown voltage is strongly affected by the sidewall contamination. Annealing under nitrogen after the mesa etching improved the electrical properties of the InGaN/GaN MQW LEDs. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1491585
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  • 4
    Electronic Resource
    Electronic Resource
    Effects of growth interruption on the optical and the structural properties of InGaN/GaN quantum wells grown by metalorganic chemical vapor deposition (2001)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 90 (2001), S. 5642-5646 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Effects of growth interruption on the optical and the structural properties of InGaN/GaN quantum wells were investigated by using photoluminescence, transmission electron microscopy, optical microscopy, and high resolution x-ray diffraction. The InxGa1−xN/GaN (x〉0.2) quantum wells used in this study were grown on c-plane sapphire by using metalorganic chemical vapor deposition. The interruption was carried out by closing the group-III metalorganic sources before and after the growths of the InGaN quantum well layers. The transmission electron microscopy images show that with increasing interruption time, the quantum-dot-like regions and well thickness decreased due to indium reevaporation or the thermal etching effect. As a result the photoluminescence peak position was blueshifted and the intensity was reduced. Temperature- and excitation-power-dependent photoluminescence spectra support the results of transmission electron microscopy measurements. The sizes and the number of V defects did not differ with the interruption time. The interruption time is not directly related to the formation of defects. The V defect originates at threading dislocations and inversion domain boundaries due to higher misfit strain. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1410320
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  • 5
    Electronic Resource
    Electronic Resource
    Determination of Alpha-Beta-Lactose in Dry Products of Milk from Rates of Crystallization (1951)
    s.l. : American Chemical Society
    Analytical chemistry 23 (1951), S. 888-890 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac60054a015
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  • 6
    Electronic Resource
    Electronic Resource
    Strong acceptor density and temperature dependences of thermal activation energy of acceptors in a Mg-doped GaN epilayer grown by metalorganic chemical-vapor deposition (2002)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 80 (2002), S. 1001-1003 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: P-type GaN layers were grown on sapphire by metalorganic chemical-vapor deposition and then rapid thermal annealing (RTA) was performed to electrically activate Mg impurities. Varied acceptor densities were obtained by RTA temperature and Mg concentration. Temperature-dependent Hall effects show that the thermal activation energy of the acceptor (EA) is strongly dependent on the acceptor density (NA), approximated by EA(0)=372−1.16×10−18 NA meV at 0 K. A strong temperature dependence of EA was also obtained in this study. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1448666
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  • 7
    Electronic Resource
    Electronic Resource
    High-performance liquid chromatographic analysis of flordipine in human plasma
    Amsterdam : Elsevier
    Journal of Chromatography B: Biomedical Sciences and Applications 308 (1984), S. 382-386 
    Details
    ISSN: 0378-4347
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0378-4347(84)80235-2
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  • 8
    Electronic Resource
    Electronic Resource
    Dose Proportionality and Population Characteristics of Oral Fadrozole Hydrochloride, an Aromatase Inhibitor, in Postmenopausal Women (1993)
    Springer
    Pharmaceutical research 10 (1993), S. 1760-1764 
    Details
    ISSN: 1573-904X
    Keywords: fadrozole hydrochloride ; linear pharmacokinetics ; population components of variance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The dose proportionality of the pharmacokinetics of fadrozole was investigated in 18 healthy postmenopausal women. Fadrozole hydrochloride was administered as 0.3-, 1.0-, and 2.0-mg oral doses continuously every 12 hr for 5 days each in a Latin square design. At steady state, the dose-normalized pharmacokinetic parameters AUC and C max were found to be independent of the dose. In addition, no statistically significant differences in t max were detected. It was concluded that the pharmacokinetics of fadrozole were dose proportional in the projected therapeutic dose range. The relationship between oral clearance and the demographic factors, age, weight, and height, was assessed. Oral clearance was related to total body weight but not age or height. Prospective estimates of the population components of variance showed that intersubject variance accounted for 91.7% of the total random variance. Weight variance accounted for 36.1% of the intersubject variance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018930316215
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  • 9
    Electronic Resource
    Electronic Resource
    Pharmacokinetic Disposition of Multiple-Dose Transdermal Nicotine in Healthy Adult Smokers (1992)
    Springer
    Pharmaceutical research 9 (1992), S. 1451-1455 
    Details
    ISSN: 1573-904X
    Keywords: Nicotine TTS ; transdermal pharmacokinetics and pharmacodynamics ; components of variance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The pharmacokinetics and cardiovascular effects of nicotine and its major metabolite, cotinine, were characterized during repeated once-daily application for 5 days of a 30-cm2 nicotine transdermal system, Nicotine TTS (Habitrol), to nine healthy, black, adult, male smokers. Subjects abstained from smoking throughout the study. Pharmacokinetic analysis indicated that nicotine was delivered from Nicotine TTS for the 24-hr application period averaging 0.76 mg/ cm2/24 hr, and at a relatively constant rate compared to other modes of drug administration. The transdermal clearance of nicotine, 1351 ml/min, coincided with reported values following intravenous nicotine administration; however, the terminal-phase half-life, 5.0 hr, did not. An analysis of the components of variance contributing to the variability in nicotine delivery from repetitive application of Nicotine TTS indicated that the in vivo transdermal permeation of nicotine is rate limited by both the device and the intrinsic skin conductivity. Clinical cardiovascular side effects were negligible as an apparent result of subclinical vasopressive nicotine concentrations, although drug activity with regard to other effects was manifested.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1015862930096
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  • 10
    Electronic Resource
    Electronic Resource
    Intra- and Intersubject Variability: Mixed-Effects Statistical Analysis of Repeated Doses of an Angiotensin Converting Enzyme Inhibitor, CGS 16617 (1989)
    Springer
    Pharmaceutical research 6 (1989), S. 328-331 
    Details
    ISSN: 1573-904X
    Keywords: random-effects statistical model ; bioavailability trials ; biological variation ; intersubject variability ; intrasubject variability ; CGS 16617
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The intrasubject and intersubject variabilities for CGS 16617, an angiotensin converting enzyme inhibitor, were evaluated in an open-label, repeat single-dose bioavailability trial. Eight healthy male volunteers each received a 20-mg oral dose of CGS 16617 as an aqueous solution on four separate occasions. Components of variance were evaluated for a mixed-effects statistical model in which subjects were regarded as a random factor. While intersubject variability was statistically significant (P 〈 0.05) for all pharmacokinetic variables measured, AUC, C max, t 1/2, and t max, its contribution to the total observed variability was relatively small for AUC, t 1/2 and t max. The proportion of variation due to intrasubject variability was 70, 19, 61, and 72% for AUC, C max, t 1/2, and t max, respectively. Ramifications of the large intrasubject source component of variability as related to bioavailability trials and biological variation are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1015954609527
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