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  • Artemia  (3)
  • gastrointestinal transit  (3)
  • Springer  (6)
  • 1995-1999  (4)
  • 1985-1989  (2)
  • 1955-1959
Collection
Keywords
Publisher
  • Springer  (6)
Years
  • 1995-1999  (4)
  • 1985-1989  (2)
  • 1955-1959
  • 1990-1994  (2)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Biological and physical events involved in the origin, effects, and control of organic matter in solar saltworks (1995)
    Springer
    International journal of salt lake research 4 (1995), S. 335-347 
    Details
    ISSN: 1573-8590
    Keywords: Aphanothece halophytica ; Artemia ; biological management ; Dunaliella ; halobacteria ; hypersalinity ; Myxobaktron salinum ; organic release ; sodium chloride ; solar saltworks ; Synechococcus sp
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geography
    Notes: Abstract Aspects of communities and events in the concentrating ponds (S.G. 1.130 to 1.214) and salt crystallizing ponds (S.G. 1.215 to 1.264) of solar saltworks pertinent to salt manufacture are described. Communities that aid salt manufacture enable continuous and efficient production of high quality salt at a saltworks' design capacity, and they provide important controls on levels of organic matter in the brine. Fluctuating salinities, high concentrations of nutrients, and petroleum products are disturbances that causeAphanothece halophytica andDunaliella salina to release excessive quantities of organic matter, and that suppress or cause death to nutrient stripping organisms. Disturbances result in decreased quality and quantity of salt and increased costs for salt harvest, washing, and pond upkeep. Organic matter can be controlled by management techniques that keep nutrient stripping communities at proper levels and maintain a narrow and unchanging range of salinities in each pond, by constructing pond dikes able to withstand wind and water erosion, and by preventing spills of petroleum products in the ponds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01999117
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  • 2
    Electronic Resource
    Electronic Resource
    Observations on a solar saltworks near Burgas, Bulgaria (1998)
    Springer
    International journal of salt lake research 7 (1998), S. 357-368 
    Details
    ISSN: 1573-8590
    Keywords: Aphanothece ; Artemia ; cyanobacteria ; biological management ; Dunaliella ; hypersalinity ; sodium chloride ; solar saltworks
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geography
    Notes: Abstract Data on biota and nutrients in solar ponds of a saltworks near Burgas, Bulgaria, were obtained. Surveys of the biota were undertaken, and records from management officials gave information on biological and physical conditions related to salt production. The decrease in the quality and quantity of sodium chloride harvested that began 10 to 15 years before the study, may be related to the high levels of plankton, combined nitrogen and phosphate, and the large accretion of bottom sediments and density of benthic communities. Biological management can improve the quality and quantity of the sodium chloride produced by the saltworks.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009034431619
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  • 3
    Electronic Resource
    Electronic Resource
    Observations on a solar saltworks near Burgas, Bulgaria (1998)
    Springer
    International journal of salt lake research 7 (1998), S. 357-368 
    Details
    ISSN: 1573-8590
    Keywords: Aphanothece ; Artemia ; cyanobacteria ; biological management ; Dunaliella ; hypersalinity ; sodium chloride ; solar saltworks
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geography
    Notes: Abstract Data on biota and nutrients in solar ponds of a saltworks near Burgas, Bulgaria, were obtained. Surveys of the biota were undertaken, and records from management officials gave information on biological and physical conditions related to salt production. The decrease in the quality and quantity of sodium chloride harvested that began 10 to 15 years before the study, may be related to the high levels of plankton, combined nitrogen and phosphate, and the large accretion of bottom sediments and density of benthic communities. Biological management can improve the quality and quantity of the sodium chloride produced by the saltworks.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02442144
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  • 4
    Electronic Resource
    Electronic Resource
    The effect of density on the gastric emptying of single- and multiple-unit dosage forms (1986)
    Springer
    Pharmaceutical research 3 (1986), S. 208-213 
    Details
    ISSN: 1573-904X
    Keywords: gastrointestinal transit ; pellet density ; floating formulations, gastric emptying
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The gastric emptying of pellets and single units of different densities has been followed in healthy subjects using the technique of gamma scintigraphy. The gastric emptying of the light pellets was affected by their buoyancy in the upper part of the stomach. However, the mean gastric emptying rates of pellets and single units were not significantly affected by density. Floating or buoyant delivery systems may have little advantage over conventional systems. The presence of food in the stomach was found to be the major factor in determining the gastric emptying of single units.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1016334629169
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  • 5
    Electronic Resource
    Electronic Resource
    Correlation of Phenylpropanolamine Bioavailability with Gastrointestinal Transit by Scintigraphic Monitoring of 111In-Labeled Hydroxypropylmethylcellulose Matrices (1989)
    Springer
    Pharmaceutical research 6 (1989), S. 274-278 
    Details
    ISSN: 1573-904X
    Keywords: bioavailability ; scintigraphy ; gastrointestinal transit ; controlled release ; phenylpropanolamine ; hydroxypropylmethylcellulose
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Two controlled-release hydroxypropylmethylcellulose (HPMC) matrix formulations, a single-unit and a multiple-unit system, have been evaluated in human volunteers. Both formulations contained the sympathomimetic drug phenylpropanolamine hydrochloride and each was radiolabeled with 111Inbound Amberlite IR 120 ion-exchange resin. The formulations were administered to each of six healthy male volunteers and gastrointestinal (GI) transit was monitored using a gamma camera. Serum samples were taken at set time intervals and assayed for phenylpropanolamine content, thus allowing blood drug levels to be correlated with the position of the dosage form in the GI tract. The multiple-unit system emptied from the stomach gradually over a period of about 180 min, when administered after a light breakfast, whereas the single-unit dosage forms had extremely variable gastric emptying times (range, 60 to 〉570 min). However, both formulations provided prolonged phenylpropanolamine blood levels. The differences in the blood profiles obtained with the two formulations were attributed to variations in their in vitro release rates and not to any differences in their GI transit times.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1015986121822
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  • 6
    Electronic Resource
    Electronic Resource
    The Effect of Oleic Acid on the Human Ileal Brake and Its Implications for Small Intestinal Transit of Tablet Formulations (1999)
    Springer
    Pharmaceutical research 16 (1999), S. 92-96 
    Details
    ISSN: 1573-904X
    Keywords: ileal brake ; oleic acid ; tablets ; gastrointestinal transit ; scintigraphy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Purpose. A human volunteer study was carried out to investigate whether activation of the ileal brake mechanism affects the transit of tablets through the small intestine. Methods. Oleic acid, which has previously been shown to activate the brake, was delivered to the small intestine in a modified release capsule at doses of 300 mg, 600 mg and 1200 mg. The effect of the oleic acid was determined by measuring the transit of two sets of radiolabelled tablets by gamma scintigraphy. One set of tablets was dosed with the capsule and the other one hour later. Results. The results show that in the majority of the volunteers small intestinal residence time was greater with the oleic acid than control. The effect was most pronounced in the tablets given concomitantly with the capsule and with the higher doses of oleic acid. Conclusions. The ileal brake, activated by oleic acid, can slow the transit of tablets through the small intestine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018827030210
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