GLORIA

GEOMAR Library Ocean Research Information Access

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Erratum: Condensation of a supersaturated vapor. VIII. The homogeneous nucleation of n-nonane [J. Chem. Phys. 90, 1856 (1989)] (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 92 (1990), S. 7722-7722 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.458628
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Condensation of supersaturated vapor. VII. The photoinduced nucleation of o-tolualdehyde and its underlying reaction mechanism (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 88 (1988), S. 5007-5013 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: On illuminating a supersaturated vapor containing a low concentration of o-tolualdehyde with ultraviolet light, nucleation occurs. This paper presents values for the diffusivity of the photonucleator and measurements of the quenching effects of NO on the rate of nucleation. These diffusivities lead to lower limits for the radius of the photonucleators of 4.5 to 8.7 A(ring), depending on which supersaturated vapor is used. A numerical simulation of the quenching effects of NO, assuming photoinduced nucleation occurs via a radical mechanism, was also made. The measured quenching effect agree qualitatively with those predicted by the simulation. We conclude that the photonucleators are photoproducts resulting from the reaction of photoexcited o-tolualdehyde with other vapor phase molecules. The reaction mechanism depends on the wavelength of the ultraviolet excitation light and the chemical reactivity of the supersaturated vapor, and may be a radical reaction mechanism. In the presence of NO, the reaction mechanism changes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.454680
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Condensation of a supersaturated vapor. VIII. The homogeneous nucleation of n-nonane (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 90 (1989), S. 1856-1865 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Homogeneous nucleation rates for n-nonane were measured as a function of supersaturation at nine temperatures (233 to 315 K) using an upward thermal diffusion cloud chamber. On each isotherm, the supersaturations were set to values which produced nucleation rates ranging from about 5×10−5 to 100 drop cm−3 s−1. The observed dependences on both temperature and supersaturation were compared to the predictions of several nucleation theories. Closest agreement was obtained with classical theory. Nonetheless, a multiplicative temperature-dependent correction that ranges from 2×10−5 at 233 K to 4×103 at 315 K was required to make classical theory agree with experiment. A comparison of our nucleation rate measurements to measurements made using two different expansion cloud chambers showed consistent deviations from classical theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.456027
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Condensation of a supersaturated vapor. XI. Stable operation of a thermal diffusion cloud chamber (1996)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 104 (1996), S. 8657-8661 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: A key approximation in the analysis of upward thermal diffusion cloud chambers is that both the heat flux and mass flux (in the center part of the chamber) are plane parallel. Procedures for determining when this approximation is valid are described. The key experimental parameter is the amount of heat added to the chamber walls to prevent vapor from condensing on them. Underheating the walls causes the experimental rates to be as much as 105 smaller than they would be when the plane parallel flux approximation is valid. Overheating the wall causes convection in the chamber center, also invalidating the plane parallel flux approximation. However, there does exist a range of wall heat values between these under and overheating limits over which the nucleation rate is negligibly affected. The overheating limit depends on the type and amount of noncondensible carrier gas present, whereas the underheating limit does not. Decreasing the molecular weight of the noncondensible gases, or decreasing the noncondensible gas pressure, increases the overheating limit. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.471554
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Initial investigation of the homogeneous nucleation of cesium vapor (1994)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 101 (1994), S. 459-467 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Initial measurements of the homogeneous nucleation of supersaturated cesium vapors using an upward thermal diffusion cloud chamber specially designed for use with highly reactive materials are presented. Comparison of the supersaturations measured at higher temperatures (greater than 455 K) with the supersaturations predicted by Classical nucleation theory show for the first time that the nucleation behavior of simple normal metals can be described by Classical theory. This agreement implies that the description of relatively large clusters of simple metal atoms (more than 25 atoms) as small liquid droplets with bulk metallic properties is valid. However, as the temperature decreases below 455 K, an increasingly larger supersaturation than that predicted by theory is required. This deviation from theory is so sharp that by 430 K the difference is an order of magnitude, and below 420 K nucleation cannot be observed. The deviation is discussed in the context of loss of bulk metallic properties with decreasing critical nuclei size. Other possible reasons for a deviation towards larger supersaturations are also considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.468155
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Condensation of a supersaturated vapor IX. Nucleation on ions (1994)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 101 (1994), S. 2309-2318 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: A new method for measuring steady-state nucleation rates on ions in an upward thermal diffusion cloud chamber is described. It provides quantitative measurement of all relevant variables, i.e., temperature, supersaturation, and ion density. Each of these variables, as well as the ion sign and the chemical makeup of the ions, can be readily changed and investigated. Using this technique, it is shown that the nucleation rate is directly proportional to the ion density. It is also shown that there is no dependence of the nucleation rate on electric field strength nor is there a dependence on the ion's chemical makeup.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.467671
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Condensation of supersaturated vapors. X. Pressure and nonideal gas effects (1996)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 104 (1996), S. 8649-8656 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Calculations of temperatures and supersaturations in nucleation experiments often include the assumption that all gases are ideal and they ignore the increase in vapor pressure due to the presence of noncondensible gases. Regardless of experimental technique, such assumptions can lead to substantial errors when comparing experiment to theory, especially when included in only one or the other. To demonstrate these effects, the procedures for calculating the temperatures and supersaturations in thermal diffusion cloud chambers are examined in detail. Nonideal gas effects do alter them; however, these effects also alter the rates calculated by nucleation theory and the effect is larger on nucleation theory than on the analysis of the experimental data. Due to the presence of noncondensible gases there also is a Poynting type effect, but it very nearly cancels in thermal diffusion cloud chambers when included consistently in both theory and experiment. An additional effect which arises only in nucleation theory is the nonzero compressibility of the critical nuclei. The net result (for n-nonane), when these effects are included consistently in both experiment and theory, is to reduce the temperature dependence of the multiplicative correction to theory necessary for agreement with experiment. None of these effects account for the previously observed apparent decrease in nucleation rate with increasing total pressure. Also critically examined are the uncertainties in the transport properties used to calculate the chamber profiles. Of particular interest is the uncertainty in the thermal diffusion factor which changes systematically with composition and thus with total pressure. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.471553
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Quenching effect of nitric oxide on the photoinduced nucleation of carbon disulfide (1987)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 91 (1987), S. 2504-2508 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100294a013
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Condensation of a supersaturated vapor. XII. The homogeneous nucleation of the n-alkanes (1996)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 105 (1996), S. 4707-4713 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Homogeneous nucleation rates as functions of both supersaturation and temperature were measured in an upward thermal diffusion cloud chamber for four n-alkanes: n-heptane, n-octane, n-nonane, and n-decane. Nucleation rates from about 10−4 to 5×100 drops cm−3 s−1 were obtained in the temperature range, 241 to 330 K. Their dependences on supersaturation and temperature were compared to predictions of several nucleation theories: the internally consistent Classical theory, two versions of the Kalikmanov–van Dongen theory, and the Delale–Meier theory. Each theory predicted the dependence of the nucleation rate on supersaturation reasonably well. However, large temperature dependent correction factors were needed for quantitative agreement between measured and predicted nucleation rates. A plot of the ratio of measured to predicted nucleation rates vs reduced temperature shows that all n-alkanes investigated can be represented to within a factor of ten by a single, best fit line. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.472312
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Calcite growth inhibition by iron (1993)
    s.l. : American Chemical Society
    Langmuir 9 (1993), S. 1423-1430 
    Details
    ISSN: 1520-5827
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/la00029a043
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...