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  • 1
    Electronic Resource
    Electronic Resource
    Influence of age on serum protein binding of propranolol (1984)
    Springer
    European journal of clinical pharmacology 26 (1984), S. 251-254 
    Details
    ISSN: 1432-1041
    Keywords: propranolol ; plasma protein binding ; age effects ; α1-acid glycoprotein
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The extent of propranolol protein binding was determined in three different age groups of healthy drug-free caucasian males. Volunteers selected for study were 6–15 years old, 25–36 years old and 68–76 years old. Ten milliliters of blood were obtained via venipuncture and collected in glass tubes from the subjects after an overnight fast. Binding determinations were performed by equilibrium dialysis using radiolabelled propranolol. Serum albumin and α1-acid glycoprotein concentrations were determined in all subjects by radial immunodiffusion. The results obtained showed wide intersubject variability in the binding ratio of propranolol and serum concentrations of α1-acid glycoprotein. Mean albumin serum concentration was found to be significantly lower in the elderly group as compared to the adult and pediatric groups (p〈0.02). A positive correlation was found between the binding ratio of propranolol and the serum concentration of α1-acid glycoprotein in all the subjects (r=+0.66,p〈0.005). No significant correlation was found between the binding ratio of propranolol and the serum concentration of albumin (r=−0.03,p〈0.88). These data suggest that the extent of propranolol binding is influenced primarily by serum concentrations of α1-acid glycoprotein and not by differences in age.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00630294
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  • 2
    Electronic Resource
    Electronic Resource
    Clinically Desirable Drug Interactions (1985)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Pharmacology 25 (1985), S. 67-95 
    Details
    ISSN: 0362-1642
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Medicine , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.pa.25.040185.000435
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  • 3
    Electronic Resource
    Electronic Resource
    Photochemical generation of the optoacoustic effect: an acoustic analogue of the method of intermittent activation (1986)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 90 (1986), S. 711-713 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100277a001
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  • 4
    Electronic Resource
    Electronic Resource
    Chronology of palaeoclimatic change at the end of the last glaciation (1984)
    [s.l.] : Nature Publishing Group
    Nature 311 (1984), S. 47-48 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Accumulation of greater amounts of quartz in deep-sea sediments during glacial periods than during times of warmer climate has been recognized7'8 and been attributed to increased wind erosion from arid regions during those cold periods7"11. A marked change in global atmospheric circulation at the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/311047a0
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  • 5
    Electronic Resource
    Electronic Resource
    The volcanic history of Ruapehu during the past 2 millennia based on the record of Tufa Trig tephras (1997)
    Springer
    Bulletin of volcanology 59 (1997), S. 136-146 
    Details
    ISSN: 1432-0819
    Keywords: Key words Ruapehu ; Tufa Trig Formation ; Holocene ; Tephra ; Hydrovolcanic ; Pyroclast morphology ; Crater Lake ; Marker beds
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  Tufa Trig Formation comprises a sequence of at least 19 andesitic tephras erupted from Mt. Ruapehu (Tongariro Volcanic Centre, New Zealand). Tephras of Tufa Trig Formation are the most recent eruptives from Ruapehu, dated between ca. 1850 years B.P. and the present. Members of the Formation show restricted dispersals, principally to the east of Mt. Ruapehu. Volumes calculated for the most widespread members are all less than 0.1 km3. Compared with other Mt. Ruapehu eruptives, Tufa Trig Formation tephras represent small eruptions that have contributed little tephra to the ring plain. They do, however, show a greater frequency of eruption with one event occurring on average every 100 years. Tufa Trig Formation members Tf3–Tf18 are black to dark grey, vitric, coarse-ash and lapilli-grade tephras which mantle the relief. They contain juvenile vitric particles which exhibit varying degrees of vesicularity, together with free crystals of pyroxene and feldspar, and few lithic fragments. Several morphological types of vitric pyroclasts are recognised in these tephras, the dominant type being of equant blocky morphology with fracture-bound surfaces (type-1 morphology). Field characteristics, tephra distributions, and the morphologies and textures of constituent pyroclasts suggest that these members (Tf3–Tf18) are the products of small-volume hydrovolcanic eruptions resulting from the interaction of fresh magma and meteoric water. We propose that a source of this water was an ancestral crater lake which formed within the late Holocene ca. 3000 years B.P. The morphological, compositional, and chemical (major-element) characteristics of three Tufa Trig Formation Tephras are compared with those of two new tephras erupted from Ruapehu Volcano during the October 1995 eruptions which comprise part of a newly defined member (Tf19) of Tufa Trig Formation. The comparisons support our interpretation that the majority of the Tufa Trig Formation tephras are primarily the products of hydrovolcanic eruptions. Other members of the Formation (Tf1 and Tf2) are coarse-grained scoriaceous tephras and are interpreted to be the products of strombolian events.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004450050181
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  • 6
    Electronic Resource
    Electronic Resource
    A thermodynamic property formulation for nitrogen from the freezing line to 2000 K at pressures to 1000 MPa (1986)
    Springer
    International journal of thermophysics 7 (1986), S. 503-511 
    Details
    ISSN: 1572-9567
    Keywords: equation of state ; nitrogen ; saturation properties ; thermodynamic properties
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A new fundamental equation explicit in Helmholtz energy for thermodynamic properties of nitrogen from the freezing line to 2000 K at pressures to 1000 MPa is presented. A new vapor pressure equation and equations for the saturated liquid and vapor densities as functions of temperature are also included. The techniques used for development of the fundamental equation are those reported in a companion paper for ethylene. The fundamental equation and the derivative functions for calculating internal energy, enthalpy, entropy, isochoric heat capacity (C v), isobaric heat capacity (C p), and velocity of sound are also included in that paper. The property formulation using the fundamental equation reported here may generally be used to calculate pressures and densities with an uncertainty of ±0.1%, heat capacities within ± 2%, and velocity of sound values within ±2%. The fundamental equation is not intended for use near the critical point.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00502385
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  • 7
    Electronic Resource
    Electronic Resource
    The prediction of high-density thermodynamic states using molecular shape factors (1988)
    Springer
    International journal of thermophysics 9 (1988), S. 975-983 
    Details
    ISSN: 1572-9567
    Keywords: corresponding states ; equation of state ; molecular shape factor ; vapor-liquid equilibrium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A new extended corresponding-states method for the prediction of high-density states for pure fluids is presented. The method incorporates the use of molecular shape factors. This approach requires accurate equations for the saturated-liquid density and the vapor pressure for the fluid in question. In addition, an equation of state for the vapor phase is also required. With this information, the molecular shape factors are calculated on the saturated-liquid line of the fluid being predicted, and they are assumed to be constant in the high-density, single-phase region along isotherms. This property prediction method is well suited for application to any fluid that has an equation of state valid in the vapor phase. Modern equations of state for nitrogen and oxygen were used to define properties of reference fluids in the development and testing of this new method. Experimental data for liquid ethylene were used to verify the accuracy of the new prediction method. Tests have shown that this approach predicts high-density data accurately to approximately six times the critical pressure and up to 85 % of the critical temperature. The results of these tests are presented and discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01133265
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  • 8
    Electronic Resource
    Electronic Resource
    Partially acidulated reactive phosphate rock (PAPR) fertilizer and its reactions in soil (1991)
    Springer
    Nutrient cycling in agroecosystems 28 (1991), S. 281-293 
    Details
    ISSN: 1573-0867
    Keywords: MCP hydrolysis ; partially acidulated phosphate rock ; pH change ; phosphate diffusion ; solubility
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract PAPR was made by partial acidulation of North Carolina phosphate rock with H3PO4. The PAPRs were incubated in bands in columns of two soils of contrasting P retention. The columns were sampled after freezing and sectioning with a cryomicrotome. The movement of P in soil incubated with33P-labelled PAPR was followed by autoradiography of polished epoxy impregnated sections of the freeze-dried soil column. PAPR solubility was also studied by a sequential dialysis process using distilled deionised water. The acid solution resulting from the dissolution of monocalcium phosphate (MCP) in PAPR moved into the surrounding soil, solubilizing soil minerals and creating a low-pH front with a high concentration of P. Depending on the soil, phosphorus moved 6–14 mm away from the fertilizer/soil interface by mass flow and diffusion in two days. The increase in 0.5 M NaOH extractable P above that of untreated soil showed a maximum at the same position as the pH minimum in the soil. In both soils, the total P movement from the fertilizer band after a two day period for 50% PAPR was comparable to that for 100% acidulation (≡triple superphosphate), indicating that acidulations above 50% did not necessarily increase the movement of soluble P from the fertilizer pellet. Variations in pH in the fertilizer-affected soil could be explained by the net balance of acidity resulting from incoming acid P solution and release of OH− during P sorption. The rock residue exhibited a transient loss in solubility which was reversed on subsequent dissolution, suggesting a possible surface alteration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01054329
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  • 9
    Electronic Resource
    Electronic Resource
    A thermodynamic property formulation for ethylene from the freezing line to 450 K at pressures to 260 MPa (1986)
    Springer
    International journal of thermophysics 7 (1986), S. 491-501 
    Details
    ISSN: 1572-9567
    Keywords: equation of state ; ethylene ; saturation properties ; thermodynamic properties
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A new thermodynamic property formulation based upon a fundamental equation explicit in Helmholtz energy of the form A=A(ρ, T) for ethylene from the freezing line to 450 K at pressures to 260 MPa is presented. A vapor pressure equation, equations for the saturated liquid and vapor densities as functions of temperature, and an equation for the ideal-gas heat capacity are also included. The fundamental equation was selected from a comprehensive function of 100 terms on the basis of a statistical analysis of the quality of the fit. The coefficients of the fundamental equation were determined by a weighted least-squares fit to selected P-ρ-T data, saturated liquid and saturated vapor density data to define the phase equilibrium criteria for coexistence, C v data, velocity of sound data, and second virial coefficients. The fundamental equation and the derivative functions for calculating internal energy, enthalpy, entropy, isochoric heat capacity (C v), isobaric heat capacity (C p), and velocity of sound are included. The fundamental equation reported here may be used to calculate pressures and densities with an uncertainty of ±0.1%, heat capacities within ±3 %, and velocity of sound values within ±1 %, except in the region near the critical point. The fundamental equation is not intended for use near the critical point. This formulation is proposed as part of a new international standard for thermodynamic properties of ethylene.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00502384
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  • 10
    Electronic Resource
    Electronic Resource
    Partially acidulated reactive phosphate rock (PAPR) fertilizer and its reactions in soil (1991)
    Springer
    Nutrient cycling in agroecosystems 28 (1991), S. 295-304 
    Details
    ISSN: 1573-0867
    Keywords: Partially acidulated phosphate rock ; mineralogy ; phosphate fertilizers ; EDS analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The fertilizer reaction products formed during the dissolution of PAPR fertilizer applied to two soils of contrasting P retention were studied using electron microscopy and energy dispersive x-ray spectrum (EDS) analysis combined with common mineralogical analysis procedures. Monocalcium phosphate (MCP) and phosphate rock (PR) residue were the main components of the PAPR fertilizer at the time of application. Dissolution of MCP in PAPR led to the formation of dicalcium phosphate dihydrate (DCPD) which was morphologically distinct from the soil matrix and easily analyzed by the microprobe. The amount of DCPD at the granule site was greater in the soil of low P retention than in the soil of high P retention, consistent with a greater transfer of fertilizer-P to the soil in latter case. The mean crystallite size of carbonate apatite in the fertilizer residue suggested a preferential dissolution of very fine crystallites at acidulations less than 50% during phosphoric acid acidulation. Electron microscopy showed dissolution of primary mineral grains (e.g. clinopyroxene) in soil adjacent to the fertilizer pellet during the dissolution of PAPR fertilizer. The precipitated products in the soil near the PAPR fertilizer pellet were complex compounds containing P, Ca, Al, Fe and Si. There was no evidence of pure phases such as variscite and strengite. These changes were analogous to those occurring in and around fully acidulated P fertilizers (TSP) in soil; however, in the case of PAPR, the reactive phosphate rock residue and DCPD at the site of application may provide a continuous source of P for plants over a long period.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01054330
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