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  • 1
    Electronic Resource
    Electronic Resource
    Random sequential adsorption of anisotropic particles. I. Jamming limit and asymptotic behavior (1992)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 97 (1992), S. 5212-5218 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We study the random sequential adsorption (RSA) of unoriented anisotropic objects onto a flat uniform surface, for various shapes (spherocylinders, ellipses, rectangles, and needles) and elongations. The asymptotic approach to the jamming limit is shown to follow the expected algebraic behavior, θ(∞)−θ(t)∼t−1/3, where θ is the surface coverage; this result is valid for all shapes and elongations, provided the objects have a nonzero proper area. In the limit of very small elongations, the long-time behavior consists of two successive critical regimes: The first is characterized by Feder's law, t−1/2, and the second by the t−1/3 law; the crossover occurs at a time that scales as ε−1/2 when ε→0, where ε is a parameter of anisotropy. The influence of shape and elongation on the saturation coverage θ(∞) is also discussed. Finally, for very elongated objects, we derive from scaling arguments that when the aspect ratio α of the objects becomes infinite, θ(∞) goes to zero according to a power law α−p, where p=1/(1+2(square root of)2). The fractal dimension of the system of adsorbed needles is also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.463820
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  • 2
    Electronic Resource
    Electronic Resource
    Random sequential adsorption of anisotropic particles. II. Low coverage kinetics (1992)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 97 (1992), S. 5219-5228 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We study the kinetics of random sequential adsorption (RSA) of anisotropic bodies (rectangles, ellipses, spherocylinders or, more precisely, discorectangles, and needles) at low-to-intermediate coverages. In this regime, the adsorption probability can be expressed as a power series in the coverage. We calculate numerically the second- and third-order coefficients of the series and compare the results to simulation data. The results for the low-coverage kinetics are then combined with the asymptotic results of Paper I [J. Chem. Phys. 97, xxxx (1992)] to construct approximate equations for the adsorption probability over the entire coverage range. While the equations provide a reasonably good description of the RSA kinetics, they produce unsatisfactory estimates of the saturation coverages. The effect of particle shape on the adsorption kinetics and surface structure is discussed. Finally, the available surface function is compared with that corresponding to equilibrium configurations of the adsorbed particles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.463988
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  • 3
    Electronic Resource
    Electronic Resource
    Kinetic aspects in the oxidation of hydrogenated 2-ethyltetrahydroanthraquinone (1987)
    s.l. : American Chemical Society
    Industrial & engineering chemistry research 26 (1987), S. 155-159 
    Details
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ie00061a029
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  • 4
    Electronic Resource
    Electronic Resource
    A structural comparison of random sequential adsorption and equilibrium configurations of spherocylinders (1994)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 101 (1994), S. 9164-9180 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The structure of two-dimensional configurations of spherocylinders (discorectangles) generated by random sequential adsorption (RSA) is analyzed via the circular harmonic expansion of the pair distribution function and compared to that of equilibrium fluids at the same density. The structural differences are minimal for short particles but become more pronounced as the aspect ratio of the particles increases. An analysis of the correlations between particles which adsorb at high coverage with their nearest neighbors in saturated RSA configurations, reveals that the most probable relative orientation for particles with aspect ratio α≈2 is perpendicular. This observation helps to explain the maximum in saturation coverage as a function of particle elongation near the aspect ratio α=2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.468046
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  • 5
    Electronic Resource
    Electronic Resource
    A Lattice Model for the Adsorption Kinetics of Proteins on Solid Surfaces (1994)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 98 (1994), S. 4906-4912 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100069a023
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  • 6
    Electronic Resource
    Electronic Resource
    The structure of a plasmid of Chlamydia trachomatis believed to be required for growth within mammalian cells (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Molecular microbiology 2 (1988), S. 0 
    Details
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Sequence analysis of a 7.5 kb DNA plasmid isolated from Chlamydia trachomatis shows 8 open reading frames (ORFs) regularly spaced along most of the sequence. One of these ORFs encodes a 451-amino-acid polypeptide highly homologous to the DnaB protein of Escherichia coli. A region between ORFs 6 and 7 contains a cluster of alternating ATs and a 22 bp sequence tandemly repeated 4 times, suggesting a replication control region. Several ORFs correspond to plasmid-specific polypeptides that have been described. Codons ending with A or T are more frequent, as might be expected from the high A/T content (64%) of the plasmid, and codon usage is similar to that of the C. trachomatis chromosomal gene, omp1L2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2958.1988.tb00060.x
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  • 7
    Electronic Resource
    Electronic Resource
    Diversity of the Chlamydia trachomatis common plasmid in biovars with different pathogenicity
    Amsterdam : Elsevier
    Plasmid 23 (1990), S. 149-154 
    Details
    ISSN: 0147-619X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0147-619X(90)90034-A
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  • 8
    Electronic Resource
    Electronic Resource
    Clinical anatomy of the suprarenal arteries: a quantitative approach by aortography (1988)
    Springer
    Surgical and radiologic anatomy 10 (1988), S. 297-302 
    Details
    ISSN: 1279-8517
    Keywords: Adrenal gland ; Suprarenal arteries ; Angiography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Une étude angiographique quantitative de l'origine et du diamètre moyen des artères de la surrénale a été réalisée à partir de 100 aortographies effectuées chez des sujets indemnes de lésions surrénaliennes, séparés en 2 tranches d'âge: 20–40 et 41–60 ans. La mise en évidence des différentes artères a été obtenue avec un pourcentage sensiblement comparable aux données de la littérature anatomique classique, en tenant compte cependant d'une visualisation moyenne des a. surrénales moyennes. Les variations d'origine concernent tout particulièrement les a. surrénales supérieures et moyennes, amenant à discuter les explications embryologiques et les implications cliniques de ces variations. Des différences statistiquement significatives du diamètre moyen de chaque artère ont été notées sur l'ensemble des sujets examinés confirmant le concept de territoires vasculaires d'origine diverse; des variations liées à l'âge ont été observées au niveau de l'a. surrénale moyenne, suggérant le rôle principal que jouerait ce vaisseau dans les adaptations physiologiques de la vascularisation de la glande surrénale au vieillissement.
    Notes: Summary The angiographic visualization, arterial origin and mean diameter per age group (20–40, 41–60 years) of the suprarenal arterial vessels have been quantitatively investigated by aortography in 100 patients without suprarenal disease. Visualization of the various arteries was achieved in a percentage substantially comparable to the anatomic data of the literature, though with lower detection of the superior suprarenal vessels. A variable site of origin was present particularly for the superior and middle suprarenal vessels compared to the inferior suprarenal arteries and possible embryological reasons and clinical implications are discussed. Statistically significant differences were found in the mean diameter of each arterial vessel in all the subjects examined, thus substantiating the concept of differential arterial supply to various portions of the gland. Age-related changes were demonstrated in the right middle suprarenal artery, suggesting a predominant role of this vessel in the physiological adaptation of the blood supply to the gland with increasing age.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02107902
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  • 9
    Electronic Resource
    Electronic Resource
    Anatomie clinique des artères de la surrénale: approche quantitative par aortographie (1988)
    Springer
    Surgical and radiologic anatomy 10 (1988), S. 12-14 
    Details
    ISSN: 1279-8517
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02116451
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  • 10
    Electronic Resource
    Electronic Resource
    Effects of the urease inhibitor N-(n-butyl)phosphorothioic triamide in low concentrations on ammonia volatilization and evolution of mineral nitrogen (1996)
    Springer
    Biology and fertility of soils 22 (1996), S. 196-201 
    Details
    ISSN: 1432-0789
    Keywords: Urease inhibitors ; N-(n-butyl)thiophosphorothioic triamide ; Urea hydrolysis ; Ammonia volatilization ; Nitrite accumulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Laboratory incubation experiments were conducted to study the influence of increasing concentrations of N-(n-butyl)phosphorothioic triamide (NBPT) on NH3 volatilization and rate of urea hydrolysis and evolution of mineral N in Ozzano, Rimini and Carpi soils with different physicochemical characteristics. Low concentrations of NBPT reduced NH3 losses due to volatilization after urea fertilization and the effectiveness of the inhibitor was related to the soil characteristics (e.g. high concentrations of organic C and sand). After 15 days of incubation, no significant reductions of losses were found for any of the NBPT concentrations employed in Rimini soil. The application of NBPT led to a considerable reduction of the formation of nitrite. This process was completely annulled with the highest dose of NBPT (0.5% w/wurea) in the Carpi soil after 15 days. In Rimini soil, however, the use of NBPT was less effective in influencing nitrite formation. The use of NBPT favoured accumulation of nitrate proportional to the NBPT concentration employed while it had no influence on the NH inf4 sup+ fixation by 2:1 layer silicates. The data obtained support previous evidence that NBPT is effective in reducing the problems encountered in using urea as fertilizer. However, environmental conditions and soil physicochemical characteristics may have an important influence on the effectiveness of NBPT.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00382512
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