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  • 1
    Electronic Resource
    Electronic Resource
    Analysis of copper in biscuits and bread using a fast-program slurry electrothermal atomic absorption procedure (1993)
    s.l. : American Chemical Society
    Journal of agricultural and food chemistry 41 (1993), S. 2024-2027 
    Details
    ISSN: 1520-5118
    Source: ACS Legacy Archives
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jf00035a040
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  • 2
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    Unknown
    Aproximación al estudio del escalonanuento vegetal en las montañas de La Rioja (1987)
    Madrid : Periodicals Archive Online (PAO)
    Estudios geográficos. 48:189 (1987:oct./dic.) 659 
    Details
    ISSN: 0014-1496
    Topics: Geography
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:6094-1987-048-89-000008
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  • 3
    Electronic Resource
    Electronic Resource
    Lipids classes, fatty acids and carotenes of the leaves of six edible wild plants (1999)
    Springer
    European food research and technology 209 (1999), S. 313-316 
    Details
    ISSN: 1438-2385
    Keywords: Key words Omega 3 fatty acids ; Omega 6 fatty acids ; Linoleic acid ; Linolenic acid ; Wild edible plant
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract  α-Linolenic acid and unusual fatty acids of the ω3 and ω6 series play an important role in the modulation of human metabolism. The presence of these acids in the leaves of several edible wild plants has recently been reported. In this study, six edible wild species were selected in order to establish the fatty acid compositions in their leaf lipids. Thus, young leaves from Amaranthus viridis L.(blet), Chenopodium album L. (goosefoot), Crithmum maritimum L. (rock samphire), Plantago major L. (plantain), Portulaca oleracea L. (purslane) and Verbena officinalis L. (vervain) yielded 1.50, 2.20, 3.02, 1.46, 3.81, and 2.28 g of lipids per 100 g dry plant material. Silica gel chromatography yielded 0.64 g (Plantago major) to 2.19 g (Crithmum maritimum) neutral lipids, 0.37 g (Plantago major) to 1.60 g (Portulaca oleracea) glycolipids, and 0.26 g (Crithmum maritimum) to 0.57 g (Verbena officinalis) phospholipids per 100 g (dry weight). Gas chromatography (GC) showed the major fatty acids to be 18 : 3ω3, 18 : 2ω6 and 16 : 0 in all fractions, with high concentrations of 18 : 3ω3 in the glycolipid fraction. GC-mass spectrometric analyses did not reveal the presence of unusual fatty acids. Carotenes were found in high concentrations, ranging from 30.5 mg/100 g (Chenopodium album) to 89.2 mg/100 g (Portulaca oleracea). The analyzed plants are rich sources of essential fatty acids (18 : 2ω6 and 18 : 3ω3) and also of carotenes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002170050501
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  • 4
    Electronic Resource
    Electronic Resource
    Recipient Factors as Determinants of Mortality after Adult Liver Transplantation (1999)
    Springer
    World journal of surgery 23 (1999), S. 1282-1288 
    Details
    ISSN: 1432-2323
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. The factors that can influence the outcome of orthotopic liver transplantation (OLT) are numerous. The purpose of this study was to determine the effects of recipient preoperative factors on patient mortality. Between April 1986 and April 1998 a total of 600 OLTs were performed in our institution. We retrospectively reviewed our first 203 consecutive primary adult OLTs with at least 4 years of follow-up. A case-control comparison was performed between survivors and nonsurvivors, and differences in recipient variables were studied for their correlation with patient mortality. A logistic regression analysis was also performed. Mortality was significantly increased among those with fulminant hepatic failure (FHF) (66.6%, p= 0.003), primary cancer (63.1%, p= 0.018), females (46.1%, p= 0.043), encephalopathy grade IV (72.7%, p= 0.012), recipients under respiratory support (69.2%, p= 0.031), and ABO-incompatible transplants (80%, p= 0.05). FHF, primary cancer, and female gender were the only variables that had a significant association with mortality in the logistic regression analysis. A higher incidence of prolonged respiratory support, bacterial and fungal infections, pneumonia, and chronic rejection contributed to the lower outcome observed in females. These results stress the need for continuous evaluation of the selection criteria of candidates for OLT suffering from primary cancer and FHF. The impact of recipient gender on mortality warrants further analysis but suggests that in the future more attention must be paid to the influence of this factor on the final outcome of OLT.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002689900663
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  • 5
    Electronic Resource
    Electronic Resource
    Hepatic Steatosis in Liver Transplant Donors: Common Feature of Donor Population? (1998)
    Springer
    World journal of surgery 22 (1998), S. 837-844 
    Details
    ISSN: 1432-2323
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Fatty change in donor livers is a risk factor for poor function after orthotopic liver transplantation. Various prevalences of steatosis have been reported in time 0 biopsies. The aim of this research was to determine, in a longitudinal study, the degree (percent of hepatocytes involved) and type (size of vacuoles) of fatty change shown by various histologic techniques. Four staining methods were used on sections from three liver wedge biopsies—at liver procurement, at the back-table, and after reperfusion—from 83 consecutive donor livers. Results in Sudan III-stained (SS) sections showed the greatest sensitivity (87.1%), negative predictive value (91.8%), and agreement rate (κ= 0.77) when compared with results in thin (1 μm) plastic-embedded toluidine blue-stained (TBS) sections. High-grade steatosis (〉30% steatotic hepatocytes) was identified in 49.4% of SS sections, 46.9% of TBS sections, 38.5% of frozen hematoxylin-eosin (H&E)-stained sections, and 20.7% of deparaffinated H&E-stained sections. Microscopic observations disclosed two types of steatotic pattern: (1) A predominantly small-droplet lipid vacuolzation (high-grade microsteatosis), similar to the steatosis associated with Reye syndrome, was seen in 29% of SS sections and 25% of TBS sections—approximately one-fourth of grafts; and (2) a combined pattern of large and small fat drops (high-grade macromicrosteatosis) was seen in 20% of SS sections and 22% of TBS sections. We concluded that moderate to severe steatosis is a frequent finding in donor livers. The difficulty in detecting lipidic microvacuoles in H&E-stained sections may be the reason for underestimating the grade of fatty change or even for diagnosing as normal some biopsies with high-grade microsteatosis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002689900479
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  • 6
    Electronic Resource
    Electronic Resource
    Hilar biliary cysts in hepatic transplantation. Report of three symptomatic cases and occurrence in resected liver grafts (1998)
    Springer
    Transplant international 11 (1998), S. 110-116 
    Details
    ISSN: 1432-2277
    Keywords: Key words Liver transplantation ; biliary cyst ; Biliary cysts ; liver transplantation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Hilar cysts are infrequent post-transplant biliary tract complications. Thirteen cases were discovered among 493 consecutive liver transplants (2.6 %). Three (0.60 %) were symptomatic (obstructive jaundice) while the other ten were found by systematically searching in the hilum in a series of 129 consecutive, resected grafts at retransplantation or autopsy (n = 54). Two types of cysts were detected: in eight grafts (1.6 %), these were blind unilocular cavities with viscid mucous content, located adjacent to the biliary tract anastomoses. These had been inadvertently created as a result of the sequestered remnant cystic duct after cholecystectomies and biliary tract reconstructions, where a double-barreled common duct and long cystic duct had been present in the donor liver. These mucoceles ranged from 0.5 to 5.5 cm in diameter (median 1.7 cm). The three symptomatic cases were diagnosed by imaging techniques 3.5 years after transplantation; however, this type of cyst was found as early as the 2nd month post-transplantation when detected in lost liver grafts. Five livers (1 %), lost between 5 months and 2.8 years post-transplantation, showed cystically dilated peribiliary glands, sometimes with multilocular, and occasionally multiple, cavities ranging from 0.5 to 2 cm in diameter (median 0.8 cm). This type of cyst was asymptomatic and located adjacent to the left, right, or common hepatic ducts. Threads were found near four cysts, suggesting that surgical injury may have been responsible for obstructing the neck of the glands. With the increasing number of long-term survivors of liver transplantation, unless preventive surgical methods are implemented, the number of symptomatic cysts of these origins can be expected to grow. Transplantation teams should, therefore, be aware of these potential causes of biliary tract complications.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001470050113
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  • 7
    Electronic Resource
    Electronic Resource
    Slurry sampling for the rapid determination of cobalt, nickel and copper in soils and sediments by electrothermal atomic absorption spectrometry (1999)
    Springer
    Microchimica acta 130 (1999), S. 295-300 
    Details
    ISSN: 1436-5073
    Keywords: cobalt ; nickel ; copper ; soil ; sediment ; slurry ; electrothermal atomic absorption spectrometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Electrothermal atomic absorption procedures for the rapid determination of cobalt, nickel and copper in soil and sediment samples are presented. The samples are suspended in a hydrofluoric acid solution before being injected into the electrothermal atomizer. Prior mild heating in a microwave oven is recommended for nickel and copper determination. No modifier other than hydrofluoric acid is required. The conventional ashing step is unnecessary since the fast-heating programmes lead to well defined atomization profiles with low background levels that can be corrected using a common deuterium device. Calibration is performed directly using aqueous standards. The results obtained for six certified reference materials confirm the reliability of the procedures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01242919
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  • 8
    Electronic Resource
    Electronic Resource
    Evaluation of the hydride generation technique for the determination of lead in commercial iron oxide pigments (1992)
    Springer
    Microchimica acta 109 (1992), S. 211-219 
    Details
    ISSN: 1436-5073
    Keywords: lead determination ; lead hydride generation ; AAS ; slurry ; iron oxide pigments
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Two different procedures based on lead hydride generation for determination of lead in commercial iron oxide pigments have been evaluated. As the procedure based on the prior acid-dissolution of the samples to give a 1M HCl final medium led to a high relative standard deviation (6.5%) an alternative procedure based on the use of slurries was studied. The samples were suspended in water containing 0.01% hexametaphosphate, and lead hydride was generated from a 0.7M nitric acid and 14% ammonium peroxodisulphate medium by addition of 10% tetrahydroborate solution. In this way, an improvement in reproducibility and sensitivity as well as a saving of time and effort was achieved. The procedure based on the use of a suspension of the samples is therefore recommended.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01242476
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